thank you guys for all the answers :) after playing for a little while i still find it fun but it is so hard to get crystals now, just to look at the amount of crystals needed for the next upgrade makes me lazy xD but ill keep playing its a great game

oh i see, so things became more expensive and the crystals i spent before on upgrades arent enough to buy them back now?

hi ppl i just came back to the game after a few months only to find out all my upgrades were gone! i had a railgun m3 and a hornet m2, now i only hae a bunch of crystals that wont do to get my upgrades back, can anyone tell me what happened? can i get my stuff back? thank you in advance!!!