It had a few really frustrating parts, but the creative ways of splitting up, the spaced out abilities, the upgrades, the diversity etc made it an awesome game that I really enjoyed in the end.
Shift as jump didn't effect me too much, turned off sticky keys/ the weird 'hold shift for 5 seconds' a long time ago . I can understand the none qwerty keyboard problem though, tiz a shame because it seems like heck of alot of effort went into this.
Game controls nicely, there are a few things that slightly annoyed me... some of the jumps getting interupted by the spawning clones, checkpoints weren't clear 'save game' indicators (I kept hitting escape and looking through the description before nervously quitting). The toilet mission confused me for a second since the boss's shoulder piece had been placed right next to it, making be try and push it towards the golden pipe. (Second time round I remembered I had a fire attack, however it wasn't clear that elements actually had an effect on items in game)