Lousy hit detection, both of ink and of spikes, render this game nearly unplayable. You can beat it, but when it kills you, not because you touch a spike, but because you're within five pixels of a sprite, or because you suddenly slip through the ink for no reason, it's just not worth it.
Once you get far enough in, the game is 100% luck based - you literally cannot squeeze through the mines regardless of your skill at times. It's no fun to be entirely unable to dodge, not because I'm not good enough, but because there's no way to keep the mines from being spaced closely enough so that there are zero openings.
This game has a really neat premise, but the execution is terribly flawed. Your robot clones do NOT follow your past actions exactly, meaning that you have to do things like continually walk into a wall for a second to make sure they'll actually walk to where they're supposed to.
I still can't beat the crumbling floor stage, not because I cause paradoxes, but because my jumps in a previous loop will now be just a little off, leading to my past robots jumping into bottomless pits that they lept over previously.
Serious bug in this game - if you save the game, beat the next level, buy a gun, start the next level, don't save the game, then reload, you'll start at the previous level but with the new gun you bought - and no XP spent. This makes it trivial to buy some pretty expensive stuff...
...But, of course, once you get a laser and overkill, it doesn't matter anyway, because laser acts like it does thousands of damage and gives you thousands of overkill XP.