Interesting....
You got a good idea, but the way you executed it is meh.
Add some more detail around the play area (ex. add in some trees, other buildings, etc.), put in some more sounds (BG music would be nice during gameplay), and add in some more levels.
Other than that, it has potential for being a good game. As it stands, it's ok for 5 min.
I got bored after the first mission...
Well...
It looked like it was going to be good, but in the very first puzzle, the bus drove right off the road and never came back. That, and that fact that everything moves soooo slooow made me stop playing pretty quick.
Fix the bugs and put in a "speed up" button, and I'll give it another go.
unfinished
1. still buggy eg. when trying to play the second level again after completing it, the game interrupts even though the bus has not reached the school. on the third level the second bus left the field after driving past the school...
2. make the bus faster
3. u should expect the user to collect all the groups
apart from that good idea
Moves way too slowly to be entertaining.