Not too bad
Just keep practicing, youll get good one day , promice. Try keeping the brush to one size to keep a style.
It was okay, but nothing really wowed me. There was one bug that happened when you jumped in diagonally, you would land sometimes inside an object or through the floor.
Then on level two, sometimes when jumping on the button it wouldn't work. It really irked me. Those bugs ruined the game for me, but with some work this could become a decent game.
Oh and something I would like to see would be better graphics in the level design. The player character has nice design so there's no reason that the levels shouldn't either.
Anyway, good luck on your future flashes. Looking forward to new stuff.