Hi!
Even though this might be your first game, I still want to give you some honest criticism.
First of all: I have played through your game completely. At least until it said "You win" for one level. And I think it's great that you've at least given a playable game!
However, I did not really like the game.
The controls are too "floaty" in my opinion. This can often be fixed by having the character land faster than he jumps. Apart from that, I often got stuck somewhere.
The sound effect was kind of "shit". :D
Also, it would have been good if you explained the gameplay somewhere. Because at least I think you can only jump when the border isn't there, but I'm not entirely sure about that.
But please don't let me demotivate you. With a little practice, your games will get a lot better.