This was a really cool concept! I enjoyed what's here, and the presentation was fun!
A few player experience issues I noticed:
When you upgrade your tools; the other tools are in the way. Since there's not really a value to using the older tools; I'd recommend hiding them as they upgrade.
It took me a minute to realize click shop a second time would close the menu; I opened the garage and went to town several times in a row haha. Added an "X" here, or changing the word "shop" to "close" would help.