Hi Chanoleproso. I've downloaded your game and play tested it.
Gameplay:
The gameplay kind of works. My only gripe is that I sometimes jump too close to the spikes (not in them) and that results in a death. It's not obvious how close I can come to the spikes when I jump on a wall near some spikes. Sometimes the feet of the character are in the spikes and he's just fine while at other times I just die. It probably depends from which angle I come flying onto the wall. So you might have to tweak the collision boxes somewhat to make it feel better.
Art & presentation:
I think there is still a lot to be desired when it comes to the art and the presentation of your game. It is simply not very appealing. What you could try to improve first is making the character more likable. Give him more character. You don't have to write any backstory but having an explorer type character jumping around a temple would make more sense than a random guy with a red shirt jupming around a grey castle.
The art doesn't make me feel like I want to know what's next. It's very repetitive. You could try having some randomization in the art. If you are not an artist try finding somebody that is. If that isn't an option then there is plenty of reference material and online pixel tutorials you can follow to learn more.
Good luck!
Developer
