It seems like the "no attacking" curse afflicts me even when the Hearts curse is not active. I'm not sure if that is a bug, or if I am misunderstanding the mechanics/controls.
This is a cool idea. It seems like this encourages a constant cycle of attacking and retreating, based on the active curse. The "One HP" curse felt a little frustrating - I am trying to avoid taking damage no matter which curse was active, so this didn't encourage me to play differently.
I wish the attack animation was a little bigger and more exaggerated, so I can tell exactly where my sword will hit.
The jump was effective AND fun to pull off. The game was most fun when I was frantically running from enemies while my attack was disabled, kiting them into corners and then jumping over them to escape.