heh, very funny
very pretty game, i think having a visible health bar for all the units would go a long way to explain what was happening in the game. the upgrades were also a bit hard to understand as to what they did, i think the upgrades were very "invisible" as to the changes they made, as in you would have to upgrade a thing multiple times to actually see any meaningful change or advantage.
same for the units, i grinded up the money until i bought the super soldier, but i never had to buy the advanced soldier at all, and i just started spamming super soldier after collecting enough energy - there was no reason to spawn any lower tier soldiers even if they cost less energy.
i think its perfectly fine for a jam game, but i do think it can be made into a bigger game with a bit of gameplay changes and performance optimization. overall, very cool and pretty!