Not good at all
It was pretty terrible sorry.
You should learn s'more Flash before going and sending your stuff into the portal.
I don't know if you tested this, but using such thin lines as walls for a maze makes it easy to cheat, half the time you can just go through them..
If you weren't joking about a "boss levels" maze game.. please practice and make it a thousand times better than this, Mouse Avoiders have been done way too many times, it's unreal.
Good effort though.