Alright, so I just published an update and noticed your edit, also to clarify, I didn't add clouds because I tried to draw them but they didn't turn out to look good :(
I agree with you, the box is hard to control but that's like one of the main aspects of the game, there are some tricks that you can use to control it better and yes, it is not that fun when you're in one section like 5/7 of the whole playtime and I actually wanted to add checkpoints before but for some reason forgot about it lol, I'll add a checkbox in the pause menu that will allow you to enable or disable checkpoints so you still can play in the "ultra-mega-hardcore" mode in 0.1.5
Edit: also I'll include Linux builds from 0.1.5 and you'll most likely lose the progress you made in Wine