It works now, thank you both for your help! 
I'm also wondering if there are a way to ensure that the +1 only happens once so that the player cannot spam one single hotspot,
how can I disable the function after one use per hotspot?

I'm also wondering if there are a way to ensure that the +1 only happens once so that the player cannot spam one single hotspot,
how can I disable the function after one use per hotspot?