Thank you so much!
You are right about a button. I shall fix it to make it more obvious.
About a bug: were you able to restart level from pause menu or did everything froze? Knowing this will help me traging that bug.
And lastly about tracking a how far you have gone: This is something I thought for sometime. I decided to have no progress bar because I wanted to create that feeling of not knowing how far you have gone and how much is left.
But your opinion is valid and I will probably add progress bar if more players see that it would improve their playing experience :)
Thank you for playing!