Well, on the positive side , I really like what you did to create a 3th dimension. On the other side, this games isn't finished, it's more of a demo. work in progress I presume
Patience is the essence. The beginning was very frustrating. You just have to push yourself to get true lvl 4.
FORGET the antidotes for now and try to SURVIVE.
At lvl 4 you obtain the sniper gun. From there it's easy peasy.
At lvl5 you get the flametrower en then you can collect all the antidotes from the earlier lvl's to get the badge of the day.
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There is a fix in the game instructions.