sorry for the stupid enemy AI, I kinda tried but I couldnt get rid of those bugs, so I decided to turn it into a feature, whenever you see an alien sign in front of the enemy, it means that the enemy is going to respawn, sorry again. Hope you enjoyed the rest of the game.
BTW you sell the enemy corpses in the morning, as the sun rises and is just above you, click on the bodies, this adds them to your inventory which can be accessed by pressing e, then just click on sell once you have coins, you buys lives, so the next time you die, you can skip and move on to the next level.
Please the game another try and use the corpses, I bet that the game will feel better!