Pretty cool game! A nice variety of mechanics and smart puzzles to go through in this kept things fresh and exciting, as well as some funny joke levels. It was a little confusing though: for a game called Karoshi "Portal", at the start and throughout it barely used the portal mechanics at all and instead was introducing other mechanics in a real haphazard way: one level you'd be using the portal gun for some cool, difficult and clever puzzles and then the next level would introduce bombs, only for bombs to be unused for the next several levels as it goes back to other mechanics and braindead platforming levels? Basically the pacing, difficulty and level order was all-around the place and it felt it could've been designed for a better flow and curve, but maybe some people like the haphazard level variety: guess it can kinda make it feel like a Warioware game, haha! There were also some minor bugs with the game but nothing too major: for example, if you shoot the portal gun at a wall, then shoot it at a box (deleting it), then shoot it at another wall, you'll create two blue portals (though they operate like an orange/blue pair instead of causing some sort of resonance cascade)!