Tricky, but I feel it'd make a good game to run in the background while you amass units~
The difficulty curve is perhaps a bit too punishing, I'd already depleted my nearby resources before getting my first lighthouse, but you mentioned that on the page already~
Did hurt to have even large groups fail but what can you do... (if at times a little frustrating to have a worker gathering resources right next to a lighthouse, but no apparent way to tell it to move that extra bit and fix it)
Honestly... I had fun, even with so little direct control~ nice work!