Thank you for the feedback and I'm glad you liked it! I will most definitely look into adding a proper options screen in the pause menu both for sound and graphics in a future update, as well as fixing the smaller bugs like the ones you mentioned, I think I have an idea of what might be causing those two in particular.
Also, believe it or not, I intentionally left the vending machines uncapped in hopes of someone doing exactly what you did, heheh.