Reminder of great game!!! And of course more QoL suggessions:
- Make game run on background!!!! This is a must!!!
- Sell/Break items to get something in change?
- x10/Max upgrade on helpers?
Great game!!!! I like.
Quality of life change suggession:
- Add % of main cube filled (for low performance setting mainly).
- Add DPS and MoneyPS (to know exactly how much damage or money you are doing with the current setup).
- Add description on hover for bottons (to know exactly what do every botton).
- Add offline farm please... 50%.. 40%.. 25%.. something upgradeable maybe?
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 "Sieger: Level Pack"){kind=icon}
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As for background playback, sorry, it doesn't seem to be possible. Try playing the game with two unminimized windows.