I think there is a bug with life regen, i have 0 lifesteal 6 life regen, each time i take damage, i get given 2 health even if I am at max health, currently sitting at 507/350hp :) health resets to max hp when i take a hp potion
not a bug but more of a programming logic/flow issue: once you have a soul, you are able to continually farm the Soul Collector by killing him, grabbing a save in the next room and then restarting the game. You load with any item you picked up from the soul collector and keep your previous soul.
You need to make it so that you either lose the soul when you kill the Soul Collector, or when you leave his room, rather than when you leave the room with his wife in.
Tips for beginners : In the first few days when money is tight, only have solar panels up in the day and no radiators, then in the night (after 0.6 time) sell the solar panels and buy as many radiators as you can. When you get to time 0.2, sell your radiators and buy solar panels. After a while you will have enough money to start getting both radiators and solar panels up all the time.
This makes it a little bit easier to get into the later stages of the game instead of dieing at 10 - 15 :)
Also, this is a brilliant concept for a game, its so much different to other TD games, its nice to see some originality.