Looks like you're on the way to some classic platform action here. I like the look of it, as well as the catchy background music.
While exploring, I realized I had trouble going back into the room displaying the message "collect keys to open doors." Was it just me, or is this by design? I'd been able to jump back into the narrower passages at other points, so I was curious.
One little bug I'd seen: if you don't exit the level immediately upon seeing the message "touch the red square..." then the message will be continually duplicated (or at least it was on my display) until it is moved off-screen. I'd recommend you double check and make sure you've cleaned up your events to prevent this from becoming an issue for you later on down the road. I think I've seen it before, and it's a matter of the "save background" option for the Object...I can't recall exactly.
Very nice indeed. I love the engine, so smooth! I completed the level, but didn't submit my score because I'll start doing that when the full versions out, and I can start to practice more. Loving it so far! Good demo. Only down thing I see is that the music gets too repetitive. But it looking really good.