Lol, I see you used my game engine :D
...anyway good game I suppose. You might want to consider making the maxJump and walljumpBounce a little higher because, as some of the reviewers said, there's a bit too much space from wall to wall.
As for the art, well yeah, it's lacking, but I looked at your user page and it's your first game submission, so it's pretty good for a first game.
Also, the gameplay could be a little more exciting. Currently there isn't much to it - just walking and collecting the "lums". It would be better if there were, say, enemies, or if you had a more difficult time getting to your goal.
Overall though, it is a pretty good game. 3/5, 7/10