There are six differently themed jungle levels that generally have different threats. You start with 10hp max, and the maximum drops by 1 every 100 turns, so you have about 1000 turns to find the cure.

When you level up you can choose a new skill (increase FOV, increase health regen, ...).

Controls

movement: 8 directions. vi keys, numpad or wasdqe

skip turn: period / full stop key

fire bow: press F to enter aim mode. use movement keys to adjust aim or tab to cycle to next target. Press F again to fire. Pressing F on a tile without a creature will cancel without firing.

You get a limited number of arrows, they replenish when you enter a new level.

Survival Hints

As this is a jam you might appreciate these hints to speed up your progress.

Snakes: these typically lurk in bushes. They don't move, but they will bite you if you get too close. Their poison causes blindness for 10 turns.

Crocodiles: beware of going near water - crocodiles initially start hidden. There is a small chance each turn of detecting them (this chance can be increased with one of the character skills). Otherwise they will emerge when you get too close and they attack...

Spiders: these ambush, but unlike the snakes they will charge at you if you get too close (2/3 tiles?), or if you fire an arrow at them, but otherwise they will wait for you to get snagged by a web...

There's a tough type of creature on the last level that's also very fast, but it has two weaknesses - it is blind so it'll only find you by chance, so you might be able to sneak round it. And shooting one with an arrow will slow it down to normal speed for 20 turns.

Skills: the spear skill is a good one to level up early