A cute little game. But I don't think anyone is ever going to get the upper level achievements. My score was #1 in the top scores (so far - the thing is over 2 weeks old so it's not like this is the first day) and I only got to level 10 in that (and that was after beating my own score after already being #1 in the top scores), so what are the odds anyone is ever going to get to level 25? I can hardly imagine how dense the "kill" boxes will be by 20. Of course I could have gotten much farther if I hadn't been trying so hard to get the green boxes. About that too, giving 60 points for the green good boxes and no points for anything else except for a SLOW time-based count-up is no good. It basically makes getting the green boxes the single solitary objective, at the beginning of the game, even of higher priority than avoiding the red ones. I like the deal with the puzzle pieces. It makes it a tough decision whether to get the second piece and clear your damage or wait for one later when you're more damaged but still alive so that it clears more damage. Kind of like how I used to avoid getting all the health kits in doom because by golly, it's a waste if the +25 boxes give me anything less. So I'd run around with 30% health or something, just because if I accidentally ran over 2 of them they both would be fully utilized. But that's just the sort of fruitcake I am.
I don't know what the deal is with upgrading prestige is. Based on the medals, I had a sneaking suspicion that it was something that appears at level 10 and that it is the key to getting to higher levels (like 25) and I would have noticed it if I hadn't been constantly distracted with avoiding red boxes and getting green ones. But THEN on the main menu when I was NOT playing, the "speed level" box kept increasing from 3 to 4 to 5.... up to 10, and the + button did nothing until I got to 10, and then when I pressed the + button it set it back to 3. So I'm guessing it's probably NOT the key to getting to higher levels. It's just some fruity strange thing to let you set it back to a lower level in some sense after it decides you're really good? It's a mystery. According to the author comments, I just upgraded my prestige. Great. I'm prestigious. But the instructions need to SPECIFICALLY say what the properties of this are. What is significant about it? Is it significant that it set the max speed from 10 back to 3? Etcetera.