Minecraft, right???

I started to making normal minecraft in roblox but... when i published the game it started to act wierd... had many errors that wasnt there before, i think something is in here. Something is killing me when i started the game and sometimes i can see eyes in inventory where supposted to be my avatar. I dont know what to do but when i ried to fix it my studio crashed i cant for some reason only add things, I really dont know what to do. If you will try this... DO NOT GO FAR FROM SPAWN! It starts to be very wierd and buggy, something invisible is in the ground welp i forget t- just how the entity looks like but i remember it only had visible legs...