Most Minecraft-related uploads on Game Jolt are either independent fan-made recreations (like 2D spin-offs or retro revivals) or modpacks intended to be used with a legal copy of the game.
While is a paid game, you can legally download a free trial from the official Minecraft website to test if your hardware is compatible . Beware of "Free" Downloads on Game Jolt minecraft java edition free download gamejolt free