Tower Descent

It seems that you are a beginner, so I get that it can't be perfect. Some advices:

Already said, but the game is slow. I personally would prefer a game with fast speed rather than too slow; at least it would give it some punch, which your game lacked (but you're a beginner so it's not a problem, you'll learn) Don't know what the green balls do but I assume they were supposed to kill you too :p
Gameplay itself is rather basic but yeah, when you learn it's hard to focus on something else than the technical integrity; doesn't mean you can't fool around with the code. (for instance, giving it more speed would have been a more fun experience)

Simple, but pretty nice. The movement feels a little slow and floaty but overall it's not bad. The graphics look okay but some effects when the enemies die would be good. Likewise, it could use a few more sound effects.

A solid start. It all holds together which is good jam result for a beginner. I like the player and skeleton sprites. You have a lot of room to improve upon this if you want to. If you do, I would either change the movement to be less floaty to better fit with the tight spaces, or open up the world a bit more.
Also, the rolling green circles don't have the kill player code on them :P

Nice basic idea, my biggest complaint are the controls feel a little too floaty. Feels like character has no weight and was not really satisfying to move around.

Straitforward idea. Not sure what the green balls were though, as they don't seem to do anything bad. I only noticed you could jump on the skeletons in the last level btw.

Overall a little too simple, but it works and I really liked the skeletons walk cycle.

Not too bad of an entry for what I assume is your first game. The gameplay was pretty basic, but the levels werent so bad. You just have to polish what you already have, so it's gonna look and feel better.