Since there is a limit on the number of food and toys that can be placed on the ground, it needs a counter to track both plus a way to sell / remove them (i.e. to replace a toy with a better one)
Nice concept. However, food and bugs shouldn't just disappear, but there should be a message or other hint about what's happening; the way toys work isn't clear; it would be better if stats are shown above each bug, instead of having to hover on each one; the font is hard to read.
Nice idea, but actually the game isn't that fun to play. For instance, cars appear all at the same time from all the directions, thus vanifing the purpose of being able to switch just some of the lights.
No save & load features and sometimes I skip a level, altough I can't reproduce it.
As a personal opinion, I don't think front wheels should have traction, but just be moved.