Player goes up in the y-as when playing

Hi @$$anonymous$$arithadeHeer - it's most likely collider of your object or terrain, but I'm just guessing.

It is always better to show wireframes, hierarchy of your object and scene + inspector, these "pretty pictures" are not usually very helpful, as the reason for this could be nearly anything.

Also, your question is not very clear, it lacks the detail how your character is setup, what collider you use, what collider is your "ground" using and what else you have going on in your scene. I didn't define any of this. See FAQ for defining questions.