took a bit to get used to the wiiiiide arena and the fact that the player doesnt actually aim at the cursor. the bosses felt a fair bit easier once i understood that i can shoot them from afar.
while getting stuck at the second boss (because i didnt quite understand its second phase), i tried charging the sniper rifle and ended up cheesing my through. might want to consider rebalancing the weapons to make the revolver able to compete with the sniper rifle's sheer damage output.