The art and level design were really good!
I couldn't finish the final level though. I kept defeating the robots and they kept spawning, and then I died. I agree with others about displaying the player's health and the number of enemies left in the level. That would have motivated me to push through and try to survive longer.
As for suggestions, the delay before being able to move after firing the kiss attack felt a bit long, so shortening it might make the controls feel smoother. The freeze frame after defeating an enemy felt really satisfying when there were only a few enemies, but in level 4, when there are many enemies, it started to interrupt the gameplay rather than enhance it since the game pauses after every kill. Maybe you could pause the enemies and their attacks but still let the player move, that would be really cool.
Great game overall!

