I already see because of the to-do gamification, this could be like Habitica, but with actual gameplay! Now for my question, is there a level cap? I feel like there isn't, but I'm just curious.

A huge open-source roguelike with 75+ minigames. Includes a physics sandbox and a To-Do list to gamify your real life. · By
Thank you for the great comment! You've perfectly captured the essence of the game.
Regarding the level cap: Technically, there isn't one.
The difficulty scales with a system called "NESTED." Each time you increase the NESTED level by 1, the recommended dungeon level increases by about 2,600. Since the NESTED level can go up to 99,999,999, you can imagine how high the levels can get!
Feel free to try entering a Block Dimension dungeon with NESTED set to 99,999,999 if you're curious. :)