Are you asking for a way to re-roll to different rewards?
There's no way to give me money, but I appreciate the thought :)
Yes ! Option to re-roll rewards at the end of the wave would definitely be appreciated.
Even my favorite indie YTuber Retromation said in his video: “For free - This game is crazy!”
I really have fun each game - Please give us the option to pay for the game … Full “optional” price would help the development…