Good concept and fitting mechanics (big can push and operate levers, but small can go thorugh tiny holes and dodge cameras). My biggest issue is that there is a lot of open space that feels sluggish to move through. This could be fixed by shrinking the levels (or increasing move speed, but that could make precision an issue).
A real bummer that the music didn't work on web, audio is so important, sound effects would have been a big plus too.
Impressive entry considering the "engine" choice!