How do you beat the level with the turret? I read the hint on your page about using the card on the turret (wouldn't have figured it out otherwise), but neither of the two possible card distributions works. The mechanic could be interesting, but the slow down isn't explored at all (for so far I've played). Perhaps you could also explain the mechanics in the game itself.
Viewing post in Hands Of Time jam comments
You have to use the card on the projectile itself, not the enemy, so the projectile can bounce back towards the enemy.
If you were on level 3 (the level where the first type of enemy gets introduced), that's why you didn't see more of the slow down. The next levels heavily use the slow down/stop time - you can easily handle incoming bullets.
If I would change something in the level design, it would be to directly show the players that the enemies can kill themselves with their own bullets. Thanks a lot for thought-provoking feedback.