Thank you a lot for the feedback! it's my first project i'm gonna try to fix it soon and upload a new version of it
p.s. I just tested the game again, it all works fine in the engine, maybe it happened somenthing while exporting it, i'll now try to test it here and upload a new build after it!
p.s.2 I just uploaded a new build after i've had the same glitch here when i played it, i think it was convertion issues, i've tested the new version and it allow to reach way more than 1 million and the shop was fine, let me know if you can find any other bug! thanks for the help!