i like the idea of changing the enemies' size to kill them but i think you could demonstrate the benefits and trade-offs for using the different attacks better cause its quite hard to tell why you would want to make them bigger or small or that there's any difference in the amount of bullets fired based on their size. Also super impressed that you made this in scratch, honestly didn't know it still existed lol :)

Congratulations on your submission! Here are some of my thoughts from playing the game
Aesthetics
- Text is hard to read due to bad spacing and lack of visual hierarchy
- music is great, it really sets a mood
- losing screen is completely unreadable

balance:
- there is only 1 type of enemy, so having different weapon options don't really matter

other:
- making game with Scratch is based
- game lags and very heavy on cpu despite being graphically very simple