Pretty good, overall.
I definitely had fun with the game, though there are a few issues. There seems to be a bug with the level select where none of the levels are available until you reload the page. The premise is fun, albeit nothing super original. I thought levels 1-18 were great as their puzzle focus seemed appropriate for the controls, however the steep difficulty spike at level 19 was disconcerting because the controls simply do not work for a precision platformer. Despite, a few flaws it is still a very fun game and I really hope to see more from you.