Nothing kills my interest in a game, especially idle, more than gating upgrades behind timers. The energy matter are already rare, there seems to be no reason to have a timer as well.
Latest upgrade ruined the game in my opinion. I left it on overnight, rebought all my stuff today, spending billions, refreshed to see if anything changed, and all my fuel was depleted. Theres really no reason to keep playing since the entire mechanics of the game changed, and earning money already took forever, now we can place less fuel and the game is less idle since you have to replace the heat dissipating parts as well. Was a good game, but this update ruined it entirely for me.
 "Defender Idle: New Beginning"){kind=icon}
 "Reactor Incremental"){kind=icon}
 "Made In Mafia"){kind=icon}