Things I would change:
-quit button during race (not restart, but quit)
-ability to maintain lane. if I line you up 98% accurate inside a lane, just stay there til I move again. The constant drifting is impossible to correct using keys but isn't really that realistic. To make it harder could have booster create a wobble effect that you hve to correct for
-exhibition race mode is really hard? Played survival mode voer & over to get max speed upgrade, still was super short. So found out your "max speed" isn't really a max, since using boost you can increase your max non-boosting speed? guess thats a bug? still too short. reading help says acceleration increases max speed. well oh of course, duh!
-can sometimes get double rewards. probably for crossing a zone after dieing, since second is for slightly more money
upgrades get expensive, survival stays boring, not going to bother maxing out car for finale. but good game played longer than I expected
56 was a huge time sink because I couldn't see where you're supposed to exit (bottom right, its a U-turn)
only bug I saw was on 57 or 58, when hopscotching up & down with the yellow to avoid moving blocks, sometimes block on the right would be highlighted, but actual movement was going off block on the left. since everything is already pixel perfect, having the computer off by 1 is really frustrating. obviously 5/5 though
Finally beat atropos after trying so many strategies. Used 4 plasma + split + splash, red hull, anti-matter bomb and 2x defense laser. Get as close to him as you can, hit him before the split. Should be able to kill the small hp bar only using 2 bombs, then secondpart is cake. grind level 11 to get more dmg bonus( lvl 4 plasma + gnrl dmg) also beat 15 lvls untouched using homing lasers and defense.
The game is definitely missing some basic instructions. For example when I started playing, I had no idea it was a two player game or that I could shoot. I assumed I had to get the white dots, but I was trying to control both at once :p Players don't read your instructions/directions that are below the game, you need to have some sort of tutorial within it.
I'd also recommend you putting in a 1player version where you fight the computer, most people play flash games alone and you want to reach as many people as possible.
You should let the player know that the game is first to 21. Since that is such a high number, most people will get bored before then and assume the game just goes on forever (and is therefore pointless, people like being able to win).
Also not sure what the impossible part is (besides the lack of a speed limit on the ball?), looks like classic pong rotated 90 degrees :p
Would really like to see a score! It also moves pretty slowly, and I encountered a small bug where I had a floating green piece that didn't move down like the rest of the blocks. Interesting tetris clone though, shame you don't plan on updating it (from what I gathered on your git)?
Why has my truck sunk into the ground all the way up to the windows! (looks like your game isn't uploaded at the right size, right click and selecting "show all" fixed it)
I don't think the mechanics make much sense considering you're controlling an ice cream truck, not a monster truck. The wheels are super bouncy and the ability to lay on the ground doing flips is completely random. The levels were obviously designed with this kind of mechanic involved, but I really don't think it goes along with the ice cream thing at all.
:/ Not trying to write a harsh comment since the art but yeah..
Fun game, some ideas were just awesome (how you did level ups!) But it was way too huge.... Spent 10 hours playing to complete it all, but nothing changed after like, the 2nd set of 24. No need to be so big!