Thanks for tying the game out and giving feedback! Yeah, I have received a lot of similar comments that the difficulty curve could be easier one. I agree with you on this!
Karma currently doesn't have any meaning other than a gimmick at the end to indicate some kind of score. Depends if I can come up with a use case for a meta progression (or if I can come up with a meta progression at all), it could be used as currency or similar :)