I played it for about 10 minutes (which is probably most I've ever spent with a game made in Construct ) a would be playing more, but I fell out of the screen. I collected the first key and was looking for where to use it, than I found the "secret" area where I picked up the bonus, I jumped to the left and fell out.
Controlling the player fells little odd, I can't really describe it, it's bit stiff I think, but overall, I liked it, good game.