The controls were smooth. From shooting to slashing. Having the effect of moving up while attacking reminded me of some Ninja Gaiden moves. It was a nice touch to stall the game when slashing some enemies. The boss was a cool way of having an objective by attacking parts of it, again reminds me of those Ninja Gaiden bosses. The shooting cross-air was a nice touch. As of writing I think I have to time it to the beat of the heart as I kept shooting randomly and missing.
The graphics and effects were well done! Fitted the theme nicely.
My only issue would be the performance. My laptop could not take the amount of carnage, so it was stuttering a lot after the second heart was destroyed. Like 3FPS or something
Doing something like this in one week is incredible, well done!