I really liked the physics of the hammer!

This is awesome, I love how simple it is. You really made a fun little game haha. I didn't get all the way through to making the sword as I lost interest but its good! I  would recommend some sort of like multiplier, if you hit the ingot perfectly 5x times or something it gets double or triple damage. Somethign like that.   

Really nice. I had a similar idea for my game, but did something completely different then :D You fit the theme of the jam really good. The game IS fun, but can get a bit repetetive. For my personal taste, the fun of smashing the block fades way before getting the sword. If you feel the same you might want to tune down the time you need to achieve the sword.

Also the game could be easily & greatly improved by adding a simple counter of how many hits a player already did.

But these are just some thoughts. It IS a cool game, has a well developed theme/story, nice & rewarding audio. It's greatly polished & I love the fact that the broken hammers keep lying around.