First thing I do when I see a level is look for obvious black square points. Above, below, and both sides of a 1 clue get filled in. Any numbers that are diagonally next to each other have to be kept apart. So do any pairs of numbers that only have 1 empty space between them. Hope this helps :)
I thoroughly enjoyed this game, a very good test of platforming skills. My two biggest gripes about it are the repetitive nature (dying often close to an exit forces you to do the room from scratch till you can get out any passageway). And the moving platforms... I feel they should have let you grab onto them like other ledges. Otherwise, a good game.
For some reason, I can't choose any level other than the first one when I am hosting a round. Also, when I signed out then in again (to join a round to play a different level), the character I had bought (Gary) wasn't available to me when I had signed in the second time.
I'm stuck on level 11, the first one with the laser bridges... I have a portal on each of the only surfaces that are portalable. I'm assuming the bridge is supposed to go through the portals like in the Valve version, but it doesnt line up for me :( I was enjoying this game, too :(