Only yeti's and giants have the strength required to carry blocks for second pyramid. Also subterranean mines produce blocks for the second pyramid. Probably just a matter of catching up on research.

I manage to get enough xenon to push forward just by spinning the prize wheel. Each spin cost one irridium bit i usually win more than i spend and also collect a lot of riddles of irridium. Xenon is a bit slower to accumulate but if you persistently spin over and over you will find yourself with plenty of xenon to work with.

Its randomized, however the payout for spinning should provide you with plenty of swag. I would say roughly every 30-50 spins would yield a crystalisk with lots of useful prizes in between.

Water treatment plant is supposed to unlock mega houses, but After finishing the research and building 3 treatment plants i still cannot upgrade my large house to mega... what am i doing wrong? Have i missed a requirement?