I have horrible, HORRIBLE reaction time, yet I didn't have a problem with the reactions required by this game. I don't think it detracts from the game at all, and I normally hate that in a puzzler. The only thing I had a problem with was the move speed of the characters. If you had to move them across the screen, it seemed like you were waiting forever for them to get there. That's a minor issue, though. 5/5!
This has already been said, but this game, while an interesting and unique concept, has almost no replay value. A single run, and you've seen all the game has to offer. This would be so much more fun if you gave stat bonuses for previous runs, or started the game with better armor after so many levels. It's a great, refreshing concept, but it falls short after a single run.
Love the game, but um...why bother to have the R button at all if you can't reset ALL the time? It's annoying for it only to work under certain conditions. There's no reason I should be able to reset when I know the shot I made isn't going to cut it.
If scientists have the anti-gravity technology to hover money, fuel cans, and tool boxes in the air, why are they wasting time and money on rockets? :/