Fun game, I like the interplay. One thing I miss from swarmsim and maybe more from super infinite spreadsheets is the fractional-spending interactions, where there you could find a complicated rhythm of hw much to hold back when spending for upgrades that hit a sweet spot of boosting future growth without choking off the lower-level present progress. Here it's either one-at-a-time or all-at-once, there's no way to strike a balance.