The game is a good one. I can see that this game is made from scratch, which is always good. You could have added some more story into it, this type of stories can be easily expanded and there is a lot of references around it could bring more interactions with people and some puzzles like the funner car engine lost its momentum and they had to solve some puzzles in it being going around and fixing the problem....etc. The game art depends on the players taste, it surely have a doodle feeling in it which is love or hate reaction depending on the player. Good luck.