making an undertale game

[Gors]

if you're doing gamedev like this then you should give up on this idea.

Gamedev is not like a simple type of art. It's not like having an artist block, and asking what character to draw. Games often involve more than visual art, as well as music, narrative and the technical bits of programming. It's far too complex to be made on a whim. Unless you are some kind of Daisuke Amaya who can make all assets alone, you'll invariably have to count on other people's help - and a project with no backbone nor real motivation is a project no one wants to take part in.

Many devs indeed ask themselves "I want to make the new Undertale" or "I want to make the new Flappy Bird". It's an option - but also means there's a sea of forgettable and empty games to download. Approaching gamedev by actively wanting to capitalize on an already existing game is very shallow, it's a very industrial way to make games.

Start with an idea first. No graphic, no numbers, nothing. Just the idea. Develop it, see how you can make this idea fun. Once you have a fun concept, then apply the character designs, music and aesthetics of your game. Let it happen naturally instead of being guided by others.