Nice job! I liked the juice with the particles & screenshake a lot, & the designs for the player & enemies are very cute.
However, it is quite immersion breaking to have the background be a default grey color. Also, while there is random generation, it doesn't add much to the gameplay in my opinion.
Finally, the game is a bit confusing when you first start playing, since there's no tutorial or instructions. Overall, nice little game! :)