How far did you get in the research tree after an hour and a half? Mostly asking to tinker around with balance.
I personally got to around 80% of the upgrades for buildings and around 20% for suit, but those are not anywhere near enough, since the slimes usually take down half the base at the bare minimum, which leaves them to build it all over again and until then the next, stronger wave appears. I managed to get stuff under control only after the 1 hour and 50 minute mark.