Very interesting concept. I like the variety of upgrades you can choose from, and how they can stack across time periods. I couldn't get very far though. I mainly kept reaching level 2, then getting overwhelmed by those tanky knight enemies. Perhaps I'm supposed to intentionally delay completing level 1 to grind? Anyway, the sprites and animations are pretty nice. The UI text seems very small though.

Great concept, graphics, enemies, execution and sound design. Go back in time and make a million dollars selling it for the Commodore 64; definitely a pleasantly retro experience. I wasn't able to pick up an axe (I played as a Viking), which was weird (I already had a sword, that I could not drop). A little more polish and this game would be perfect. What a wonderful example of what can be done in seven days.