Didn't understand the aim at the first play
Got 3 letters at the second one
Pretty decent prototype but graphics is aliased sometimes

I didn't know where to push the letter in the top right

Is there anything else to do except putting letters in mailboxes? I was unable to interact else. It seems like a good prototype like @cax said!

Some collisions are a bit weird but controls works perfectly.

@darthone You have to play in fullscreen
@chocolat-endive Thank you! You can also help the car in the top left by clicking the water away.

Oh thanks! I'll try it!

The game looks very cool, I like the style. Only the pepper is a bit blurred. Also the transition when the day is reseting is good.
I managed to push some letters in the mailbox and clean some paint or water from the street, but I didnt know what else to do. Some arrows pointing to the tasks or some clues on what to do would be good. And some collisions don't work, like the green car in the bottom right.

I managed to do it all! :) Not bad!

Fun game and the letter delivery mechanic is cool!