Very neat game concept executed with a lot of character! The genre meld is a fascinating, Pikmin-adjacent concept which is ripe for further development- in paths that might take it conceptually closer to Pikmin, or further diversify it. First, of course, it's not a bad idea to try and tighten up the controls and buff out the bugs, as much as I'm sure you're sick of it. I've noticed that my units become *soft* unselected after performing an order, where they will not accept further orders until re-selected. Speed and agility are important for this kind of game, after all.
The idea of resource costs is one way to take it, but consider that, instead of a resource cap for units, you impose time-limits or time-gated rewards. It could be as simple as a "gold star" on every level you beat a certain time on, but it would structure the game very differently than if it's based on finite resource consumption. Something to consider!
Anyway, the characters are adorable, and I hope to see them developed- both in terms of writing and artwork. The writing carries hard- I was hooked by the tutorial, and my ADHD ass loses interest in a lot of games that have tutorials that wordy- but some additional eye candy would go a long way too! I hope we see a lot more work on this, it's a unique idea!
That being said, please don't burn yourself out, either. I'd hate to see this idea get abandoned due to burnout- too many good small-term games have succumbed to such a fate.