This game is great, but I feel like curses and poison should hit block, there should be more ways to increase maximum HP, or each level should increase your size by 1 more so you have more space for consumables. As it is now every time I get to Magma Core with full health, even as I am putting out 80 damage or more every turn and putting up more than enough block to cover incoming damage plus any damage from poison or block, I get outpaced by enemies with over 100 health spitting out curses or poison turn 1. If I only fought necessary enemies and didn't take side paths maybe I could avoid this, but I feel like it is wrong to discourage that when by all means my build is firing on all cylinders. I think more enemy variety that don't just curse or poison the player would also help solve this problem.
With that said, I still think this game is incredible, and this is only a demo. Seeing the quality of what the developer has already created tells me he is probably going to analyze the data he is getting from these demo playthroughs and balance new and existing content accordingly.