(I'm back) In order for lv 21 and above to be of some use, I decided to add "Upgrade Cards". This will allow you to choose what you want to improve, but each card has a limit (that's the downside). They will only appear when you raise lv 21 and above.

Underfell Sans

Sans at the battle (remastered)

Core Frisk

Underworld Frisk

New menu (test)

Clover

Sans at the battle

Kris sprite in battle.

If you ask why there is no leg? Because canvas issue.

I will try to working at that.

Health Bar (for monsters) (+ sprites for monsters that I managed to make (3 + hard mode)).

The chances of monsters appearing:

Normal: 80%

Hard mode: 20% (after lvl 10)