This is a bit of a mixed bag for me. Let's go through some sort:
The Good Stuff:
The art is actually pretty well done considering you've worked on this on your own in one team. Good job on that!
Caveats:
I think you could benefit with better design that help with player decision making. May I suggest on having an arrow that points where the player would jump towards to help gauge jumping. Unless you're specifically going for the type of rage game like jump king but I don't think that's the kind of game you're making.
Overall, it's like a meh in my book.