Pretty fun take on a non-violent rail shooter!
For me personally, I think it'd be more fun it it was a bit more difficult and the perfect bonus was smaller, as it was about 50% of my money made (on day 3 at least). As such it felt like I HAD to get a perfect or lose out on a lot of money.
Admittedly, in regards to the difficulty, it is generally advised to make jam games on the easier side, as most people won't play games for very long, so it was probably the right decision, haha.
Also was surprised on day 2 when I discovered that the upgrades change each day, which was great to see!
Overall: well done!
