This was very enjoyable, immersive and didn't feel like it was wasting my time as I feared.
No matter when, I was always engaged with the game world, looking out for enemies that litter the forest and trying to figure out where the creature I was hunting was. Most monsters die in either one or two shots and you only have a rifle, pistol and saber for backup and melee is a risky prospect. This makes the early game very difficult more so than the late game, since as you explore and gain money you can find and buy books which give you abilities. These make a BIG difference and you'll be dominating breathing a lot easier in the late game.
For the 8€ I spent on it, I am very pleased by it and will probably buy the one man devs next game.