It's fun and the assets you picked worked well together. The allies could have probably been more useful to make them more impactful. Possibly you could have made them ignite the other blobs, letting them blow up in their wake, saving themselves. You could also make it so if they get too far away they turn evil automatically, meaning you'd have to stay in the backstab range. Hmm.. I did just triple the complexity of the game. Maybe it's better to leave it simple, even if it wasn't your first game in Godot. Good choice btw.
It took me a second time on a fresh page to realise there is a shop. I just simply clicked on play again without going to the main menu. I'd say make an extra button to the shop in the dead menu. This is extra important because the shop is pretty integral to the game, doubling my playtime.
Lastly, seeing as the points matter for the shop I'd make the points you get during the game more exponential. Currently it doesn't matter if you get one run of 100 seconds or 10 of 10 seconds, which takes the same amount of time but the second is much easier.