yes autosave works. The meaning of prestige clear.
I like this game. But have some suggetions for you.
1. If I hit prestige u get a notification and full screen mode quits. Need an option to set the notification off.
2. If you fail to defeat a boss wave, you'll receive a notification that you must acknowledge, and then you'll return for a few waves. This process repeats if you fail the boss wave again. A way to farm waves and gather resources would be beneficial.
3. I think the option to challenge bosses is great, but the reward is very low. You get more resources in the same amount of time through normal gameplay.