Very neat idea and some simple yet good looking visuals and effects!
This was like my go to ship design. I don't really even know what some of the other parts did. But this was cheap enough and got the job done for at least like 10 rounds. Obviously I used less cannons (and no extra blocks) on start.
The AI was pretty easily outclassed by abusing range even using just few cannons often worked just fine if I was running low on cash after some experimenting.
Would have been nice to get some information on the different pieces. And all the information being front loaded before you even start the game quite often goes to deaf ears too. Then you even force feed repeat that same wall of text between each try which wasn't fun. You had these "restart" and "back to menu" button but both did the same thing really.
The ship building itself was a bit clunky. Aiming the blocks where you wanted was sometimes nigh impossible. Of course you could detach the improperly attached piece but then trying to scoop it in the correct place was even harder. Showing some kind of "preview" of the position where the block would be placed while you move your cursor would have been a welcome addition.
Ok now that I'm writing this I was about to complain about zoom being too close so you could pretty much never see the cool enemy ship designs without pretty much dying. And then I remembered that the wall of text mentioned something about zooming. Back to try one more time!
Holy heck, so much more fun and easier to play too while zoomed all the way back. Kiting and strafing the enemy fire was almost too easy like this. Why was this not the default? Except for the ship building part it could be zoomed in. So could completely get rid of the manual zooming and do it like that so people actually experience the game in its best form.
Rotating the ship also felt weird (with the mouse). Would have made a lot more sense if it was always aligning to the mouse cursor instead of using your mouse cursor position like a pseudo wheel.
The biggest thing missing really was some sort of real progression. With starting from scratch every time it felt like just repeating the same thing over and over again. Groundhog day the game. Something like not having the player buy the blocks at all but then after each round they would add the fallen enemy pieces to the available pool and could then build their ship from the body pieces of ones slain enemies. That might have been interesting.
All in all, good job! 👍