surprise! i put a fantasy console in kitsune tails! not only can you use the free and open source tiled map editor to create custom levels, but you can create your own games in lua using the same simple framework we used ourselves for all the minigames in the game. this gif is me making a sample game i call "ghostzilla" from scratch
oh right, and we've prepared an arcade and over half a dozen minigames for you in the game. one's even 3D! check out the full trailer here: https://www.youtube.com/watch?v=0EQkhejCoRs
wishlist & more info at https://kitsunegames.com/kitsunetails
the minigames for kitsune tails are all just plain lua files that live in the game's content folder so you could definitely use those to get started. eat your own dogfood and all that
but of course the game will also ship with proper documentation. we're not cruel enough to let people just fumble around without guidance
big shoutout to @JoshJers for coding the barkanoid minigame. it has multiple levels and i would never have been able to do as good a job as he did with it