"nothing too new or interesting" that's how I feel about this game.
I realize it's your first game, and it's pretty good for a first attempt but how about we get some control descriptions or maybe victory conditions.
In the beginning if your trying to "ping pong" your way up the two walls, it's easier to just land on and jump from the same wall you started from in the first place.
I understand that may or may not have been intentional but if that type of difficulty in the beginning wasn't intentional, then maybe it would have been better to make the starting vault different somehow.
At any point if the character jumps off of a wall, it's jump is higher than a normal jump, that seems counter-intuitive to, well, gravity.
I made it to the end, and it was cool that there were two different platforms at the finish but nothing happens if you get there.
On the plus side the game resets correctly if the character falls out of bounds which, sure may not seem like much but some 'games' don't have that.
So, to conclude, your first game is 'okay' as long as you improve.