Not bad! The funky backspin can be annoying sometimes, but also helps sometimes. I also get lag once in a while and the dropped ball sticks to the block it lands on, instead of bouncing, and then fades out.
Well made, but feels like it could use some tweaking. Too long a delay before detonation, and there seems to be a large jump in velocity. I also prefer that velocity is set by the distance you click from the cannon. The timing just gets annoying otherwise. Still 4/5 from me.
Quite disappointing that I left the game and came back, and it only remembers the 5 levels I've completed on the main trunk. All others are showing that they haven't been played. I had at least 3 outer (Green gem) levels, and a few more intermediate.
standead is correct. The glitch in 26 is that you can jump over the top barrier, toward the right, and get the main exit key, immediately dropping to the exit. There should be a collision at the top to prevent it.
re: 19, study your greek alphabet and use the hint
@justJohn1991: Since the distance is not given, it doesn't matter. Assume a distance that's convenient to work with and go from there. Just remember that the distance is the same both ways, but the time isn't. Average speed = total distance/total time.
 "Boxheaded")
 "Gravit-Eye")
 "Find the Numbers 48")
 "Speed Escape")
 "Wheel It")
 "Test Your Brains")
 "Icebreaker")
 "Rail Pioneer")
 "Civiballs: Xmas Levels")
 "Fox'n'Roll")
 "Balbodro")
 "shrink it")
 "Paper Cannon")
 "The Forest Temple")
 "Escape Bot")
 "Level Editor")
 "Just add logic")
 "The Bouncy Challenge")