Hi, the game must be played in full-screen using the button in the bottom right. If that didnt work, can you tell me what resolution you were using?
As for the game, there is a 'roll' button to the right of the hearts, using money you press that to gain upgrades. The 'upgrade menu' you're talking about I assume is the 'Buffs' menu. This shows what upgrades you currently have. As you hadn't rolled at all, you had no upgrades, so the menu was blank.
Finally, it is intentional that you cannot move. I appreciate your feedback and recommend playing the game once more given this info, thanks!