Negatives:
No storyline other than STEAM game trailer.
Enemy corpses block projectiles & potentially weigh down player.
Limited number of recovery items for high respawn-rate of enemies.
Player required to backtrack to collect powerups hinders gameplay; annoying & useless.
TL;DR
game is worth 1/3 to 1/5 of its $15 price-tag. If the above issues are fixed it'll have something worth selling at that price. -- Watch live at https://www.twitch.tv/engineer_diesel