Thank you for such a detailed review, we'll take everything you said into consideration if we continue working on this
- on HP bars I agree that there should definitely be some kind of representation of the remaining HP, especially when it's low
- regarding the speed scale, I also agree that it feels too idle between the opportunities to add modules, something has to be done about that
- SFX in general are obviously lacking at the moment, luckily this isn't hard to fix
- as for the shop, at the moment it costs 5 crystals up front to open the shop menu, and then the modules themselves are free. This was a cheap way for us to save some development time. So the shop isn't available when you're below 5 crystals.
- the bar at the top left is actually an XP bar, not the best font choice on our part :D