Good start - rated. Please consider taking a look at mine and rating :)
Good tutorial - too many games are missing that part.
I'd suggest making wall jumping less difficult - allowing me to climb up higher faster, without requiring so many jumps.
I like the look of the game. music started very well but then quickly got a bit repetitive.
I stopped on lvl 2 because I got stuck - could not figure out how to get up there.