I'm creating an options screen with the ability to change mouse sensitivity. Also I've resolved the camera angle screen issue. I'll hopefully post a new version with these fixes later tonight.
I can also tell you that it is NEVER impossible to complete a level because of unsolvable block puzzles. And I'll stand by that statement. This is the single aspect of the game that went through the most intensive playtesting. You might think that some of the puzzles are unsolvable, but the fact is the puzzle making algorithm (although clumsy) can come up with some diabolical challenges. There were many times when I thought an unsolvable puzzle had been created, only to realize that I was wrong. Keep in mind that some of the blocks (blocks with a bright red circuit pattern over their faces) can only be toggled by shooting adjacent connected blocks. In other words, a direct blast from the surge gun won't have any effect.
I've personally played through up to level 56 on the current difficulty set up.
"Talk is cheap because supply exceeds demand."
- Unknown.