Definitely a fun skill based game. I liked the fact the bosses have a different variation on the same music theme but they got a little repetitive after attempting the same boss for a while. I actually quite like how hard it was but the boss with the missile that freeze you in place and the bullet spam seemed to have way too much health for a fight you can only reasonably attack a few times safely. Also picking up the boomerang bullets was the worst decision I ever made they're completely useless and basically only helped me slightly cheese the clone fight.
I definitely respect the amount of variety each boss had. Each felt very unique from each other and made me have to work out how to best approach fighting them.