Yeah, waste an hour on a level and get your hero killed because he had too little hp and you couldn't micro in time. This game should be renamed to Epic Fail 5 - Ultimate Waste of time
Good puzzle games involve thinking. This one doesn't. In the later levels it's just about being pixel perfect. When people actually view the walkthrough and still can't beat the level, then you know something's wrong with the game.
This game is like chess. It encompasses the idea of maximising efficiency with every single piece such that they work together in tandem to achieve a win in the best and fastest possible way. In particular, positioning is super important in the later levels. It lets you do things you wouldn't have imagined was possible :)
Guess what, the Raze soldier had one life left at 3:12 and I spent the rest of the time looking for him and only managed to kill him at 4:02 and it didn't count.
Insightful, I like that way of looking at it :)