Hi there! Thanks for the feedback!
I actually placed a sign with a red symbol in the end of the paths were the souls should not get but I agree that an actual portal would have been better to see and understand>_< About the towers, I ran out of time and left them without a section on the how to play, but you got it pretty right, aside from the damage, range and fire rate they don't have any special features...for now haha
Also, I'm glad to hear I'm not the only one wh would be pissed to work after death, this idea has always haunted me so I thought it could work as a rebelion reason in the game.
Thank you again for playing and for the feedback! I'm happy you had fun and that the difficulty didn't make it overly frustating >_< I made it a little too hard hihi