1. You're right. I am not even sure why I have that one tree it doesn't really add anything to the atmosphere or the gameplay, and it could also easily be mistaken for a background element.

2. The delay is supposed to be there, but maybe I should do some more adjusting to make it feel a little more natural.

3. The green jacket he wears is supposed to be an armor, which is why he can't be defeated by your attack, but I guess haven't really made that very obvious. The helmet guy is actually a lumberjack, which is why he wears a helmet. And the defeat animation is only temporary: stomping him was meant to only stun him, there was an animation where he was supposed to get the helmet down on his face when he gets stomped (I DM'ed you a sketch to show you what I mean) but because of how short the game is I thought that would overly complicate a very simple game, it would also be difficult to animate with the model I currently have rigged of the lumberjack. Even so, maybe I should consider removing the helmet all-together if it goes in the favor of better visual communication

4. Clearly my programming skills are very basic. I knew about the stuttering, but I couldn't manage to do anything about it. The double jump's sound effect also stutters, although the sound plays very quietly so I am sure you didn't even realize it had a sound effect.

Sorry that the game is so rushed I published it to newgrounds mainly so I could share it to my friends and teachers. But it is still a really interesting experience to hear about what strangers think of my first published game. So thank you for this helpful criticism, it is greatly appreciated! :)