Interesting concepts; I find the simple visuals striking. However, despite knowing what the numbers were and what caused what, I could never really figure out what sort of strategy I should go for; I randomly kept stacking boxes at first and that carried me all the way to Wave 11 where the game bugged out.  Especially with no way to tell the order in which enemies spawn, it's impossible to meaningfully think your construction through.

It seems that after using the blue blocks, the game doesn't recognize that the wave is over...? It just sits there, with no more enemies coming.

Also, as a fellow Godot user, here's a small tip for exporting your game: When exporting, turn on "Embedded PCK". It's right on the first page. If you do that, then you will have only one file, and don't need to give people two files!

I like the concept. Pretty fun, although I got stuck on wave 5 twice because the squares built up and couldn't attack :(

Could be really cool if you expanded on the idea. Maybe add the ability to change the order of the blocks so you can plan for the wave 🤷

Fun! I love these type of games!