That actually is good feedback yeah. I started off making this as a more casual incremental game and I thought it might be boring so I kept adding more "exciting/fun" stuff and it kind of turned into a more fast paced shooter. I think the problem was that I just thought it was a bit too boring before.
As for the tabs , yeah I think in the full game I will gate them so they unlock the more your power level increases, and add more unique rewards to them.
The bonuses that you get from opening the caches should only work for one run and the cache should be consumed.. I'll have to double check that.