Reject Humanity, Return to Monke

I looked at the holographic window with the dungeon options. For simplicity and convenience sake, I'll call it the Dungeon Menu.

Summon

Market

Customize

So, first things first, before I put in some mobs to defend the dungeon (read: me), I'll need to know the layout, so into the Customize tab we go!

New Dungeon Master detected. Initiating Tutorial mode…

(Welcome, Dungeon Master Jionni. I am the entity created by dungeons to help guide new blood. Call me Turial.)

… I blinked, then I blinked again… Did it just…

(Yes, I did. Me being a reference to one of the games you played in your past life is just a coincidence, nothing more, nothing less. As for how I know your past life, reading the Dungeon Master's memories is one of the protocols given to me to help better familiarize the new blood with the option for managing his dungeon.)

I shrugged my shoulders in acceptance. After all, coincidences sometimes happen, and since I was reincarnated into a gorilla in another world as a dungeon master, a reference to Toriel is not that unbelievable.

(Anyway, going into the Customize tab before the Summon tab is actually a good decision on your part, so it looks like you'll be able to survive for a long time. Anyway, in the Customize tab, here you can customize your dungeon in as many ways as you can imagine. Although you'll have to buy a room first before you can customize it. As of now, your dungeon has 2 room and 1 entrance, the core room included.)

The window then automated itself and the Market tab came into view.

(Now, the Market here is the most interesting part of the tabs. Here, you can exchange points to buy items or treasures. Anything you can imagine, the Market will have it, although it will come at an equal price. Take for example the sword Excalibur in the legend of your world, it would probably cost more than billions of points.)

… Anything, right? I can buy anything?

(Yes, even gender altering potions, race change potions, and some other unsavory things you may need when the situation calls for it.)

I quickly searched for it, and saw it come up. Yes! I can return back into huma- WHAT THE FUCK!? Why is it greyed out!

[Ah right, forgot to mention this, you can't change your race. Something a higher up decided, so yeah, you're stuck as a monkey. Bye now for real!]

… So I'm stuck like this… forever…? Well.. Yeah… I… Hehe… Hahaha… HAHAHAHAHAHAHAHAHAHAHAHAHA!!!!

I laughed hysterically while looking at the air that once had the system text message. Eyes tearing up by either insanity, sadness, rage, and just plain bewilderment.

"YOU MOTHERFUCKING SYSTEM! GIVE ME BACK MY HUMAN BODY!"

A few curses and venting later, I calmed down and looked around the room. The cave room was a mess, dents, cracks, and some debris lying around haphazardly as a result from my rampage. I turned my eyes back into the Dungeon Core.

(You done venting? Alright, let's continue.)

The window once again automated itself and opened up the Summon tab all by itself.

(Now this here is the main defense unit for your dungeon. Now, as for expanding the monster type you can use, it is decided by either what you, or your summoned monsters kill. Currently, you are only able to summon fellow monkey species. All of them will 100% follow your will. You can summon anything you kill, but do note that some other species are impossible to summon, such as Humans, Elves, and others.)

(To summon them, however, is more complex than spending points. In fact, you do not use points to summon monsters. Instead, you can summon monsters until the limit of the room is reached. The limit of the room is decided by how you customize it. You can exceed the limit though, but not through summoning, but by breeding. For other stuff, I'll let you discover.)

(Good day, and wish you luck in your endeavors of Dungeon Management.)

After reading through the text, the window vanished, never to be seen again. I scratched my head and sighed in response. So, I can't overpopulate my dungeon via summoning, and breeding is the only way. Looking at Summon tab, there is only one monster type summonable by me.

Monkey

Yeah, that's basically it. Checking up the Customize tab, the other room can only house 5 of them, not a lot, but enough for defending. I checked the summonable monkeys and saw that I can only summon 3 variants, Gorilla, Chimpanzee, and… Holy god almighty, a fuckin' Mandrill.

Yeah, I know what to put in then. 1 Mandrill, 1 Gorilla, and 3 Chimpanzees. The gorilla as the tank, Mandrill as hybrid, and Chimpanzees as the supports. Now, I just hope those chimps will mate with each other to increase the numbers.

I then changed the layout of the room, planting trees, some grass and fruits. Now, it looked like a mini garden. The room wasn't that large, about the size of two basketball courts together, and as tall as a third floor.

Apparently, to get more rooms, I'll have to reach certain milestones, such as the first dungeon defense against trespassers, or even just reaching a certain number of inhabitants within the dungeon. It's like an achievement system. Adding floors are also connected to the achievement system.

Now then, adding traps in a floor is not in the Customize tab, but the Market tab. Well shit, seeing that I have exactly 0 points, and I have no idea where to get them, I'll have to bench that idea for the moment.

Seeing that I have nothing else to do with my dungeon, I customized the core room and made another miniature garden, and a hammock in between two trees. Beside it grew some fruits and beside those fruits, a pond of clear water that is always clean, even if I poop in it, the Dungeon would see to it that it would be clean.

I would really like to add a computer with wi-fi in here, but those sat in the Market tab with a cost just as high. I'll have to save then if I want to get it then.

"Ah right, forgot the entrance," I pressed the Customize tab again and checked how the entrance looked. It looked just like any ordinary cave entrance, but it was surrounded by some shrubbery, trees, and grass. I customized how it looked, and now it blended with the surroundings pretty well.

Well then, job well done, time to grind my skills.