Fun game but once in a while the controls don't register. If you press twice and the controls register you end up jumping off the edge because of the lag.
not sure what happened, but when I first hit the screen with the crystal, I immediately fixed the stairs and the orb went to the right. I couldn't get to the screen on the left. clicking the arrow didn't do anything. After I refreshed the game and got back to this point, it worked fine. :s
Great game. Loved the first 3. This one's got me stuck though, can't seem to find the third generator even though something tells me it should stick out like the first 2. Also there's an area I can't seem to get to.
 "Picma Squared Mobile"){kind=icon}
 "Logister"){kind=icon}
 "Orange Block Attack"){kind=icon}
 "Deep Chalk 4"){kind=icon}