Very nice game, which even cames with a working in-game manual/quest! I'm impressed.
Very cool you have made a complete working game in 7 days.
Althought it's obv 5* from me, some points:
1. UI is the thing you can work on :)
2. Road tool could be enhanced
3. I needed to write something bad as a critique, so - pallete is far from ideal, too bright and not enough contrast :P