The game has some potential, but it's quite weird you get punished for killing the enemies instead of the usual of not killing them or killing to slow. It's a stat check game more than skill, there's no auto-collection for the currency enemies drop because that at the end of a run you will be losing currency, enemies instead of dropping more or a more valued currency in higher levels they drop the same, they just spawn more frequently.

But then you get punished even more the higher you go, since enemies will have more hp (bullet sponge/stat check aspect) and because that you will die easier/faster since you take damage from hitting the enemies.

The boss on level 3 does away too much damage, guess that is where the prototype is supposed to end.