..dude glitch

while playing. r click then lclick outside the game. sry but fail

nothing new

it's ok. but you have to draw a solid borderline because I bet all three worlds just by moving the mouse into the lower left corner. while I write these words I am "playing" sandbox hard just with that method.
add a mute button.
those "worlds": I expected a maze or something. theres no difference to sandbox mode except the time limit.
last, I liked your texts introducing the levels.

Nice

I liked the music. You should have made some sort of background though.

8/10

somewhat fun

i was very challaging on hard

Hah, I found a bug.

So, after playing for about 50 seconds, I scrolled down to rate the game, I gave it a good score, as it deserved. When I scrolled back up, I saw that the game was still running, but I ceased to lose lives. Otherwise, the game seems with out flaw, although boring with nothing to motivate further play.