Minigame 2 medal doesn't work. (Doesn't award in-game when completing Minigame 2 either). All the other medals work.
Also the top-down levels with the rolling ball are extremely laggy, especially when those fire things fire up. Consider using a simpler animation or something for the fire. The lag they cause is extremely noticeable and makes those levels un-fun.
The platforming levels are weird. Good that you include in the instructions (in case anyone actually reads those) how to actually play, by holding space then pressing W, but you're also constrained to not move until you release space, so you have to hold space, press and hold W, release space, *then* move left or right. I mean you almost would have been better to make W jump and E high jump even though that's still non-intuitive so you'd still have to include it in the instructions.