Hey, great job with your game! I really liked the aesthetics here. Maybe one suggestion I would have is for the normal obstacles/walls that cause an instant lose state, how about having them deal health damage instead? A lot of the time I felt like my upgrades were useless because most of my runs resulted in me dying from a wall or moving obstacle rather than enemies which it seems that is where the upgrades come into play.
Congrats on getting out a submission though and keep up the good work!