This was a very fun game! I love classic arcade games, so I might be a bit biased, but still. Some things I think could be improved on in the future:
More juice! The game felt kinda unsatisfying to play, destroying blocks by just spamming the p button feels repetitive, but with more feedback this effect would be greatly reduced.
Controls, it felt really awkward to control and play this game, adding a bit of unnecessary difficulty and annoyance. Especially for an arcade game, smooth and responsive controls are a huge help.
I also think the scaling could go a bit faster and the enemies could be harder. This game is at its best when you have an enormous army fighting a ton of enemies, giving more opportunities to scale and making those enemy encounters more intense would be awesome. Encounters felt slow, and scaling was too infrequent.
Great game, and a ton of room for improvement. Nice job!