Thanks for your feedback. The original game is from 1993 and I preserved most of the game mechanics.
However you can advance in battle. At least if there is a full empty row between you and the enemy. Use the large arrow button in the center.
You can cure poison (and all other conditions) for some gold at the healers. Moreover you’ll find new party members who can heal conditions as well later in the game.
And there should be quite a few antidotes to buy. You checked Alkem’s tower north of Spannenberg? Or the trader in the thief guild?