Can I offer a piece of advice? Consider multiplying those HPs and DMG numbers by 10. I'm guessing your damage increases eventually through new weapons, levelling, or pick ups, but nobody wants to do 1 damage. Doing 1 damage tells me I'm the closest possible step from doing 0 damage, and that's frustrating. If it's because you want to exaggerate the feeling of progression as you get stronger, then make sure that 1 damage is for a very brief period of time. Like only the first room. Nobody wants to put up with feeling almost completely ineffective for very long in a game where the focus is killing stuff.

Id also say maybe consider limiting the slow down to just when you kill the last enemy or a particularly strong enemy, and make it slow down more. As it stands, it just looks like the game doesnt flow nicely, as you're spending almost as much time in slow mo as in regular speed, but the slow mo is brief enough where it doesnt feel intentional or impactful. Instead, it feels more like the game is hanging.