Damn, sorry to hear that.
Each turn, you draw 3 numbers from your deck (the white buttons at the top). To confirm your turn, you’ll need to create 3 pairs of number + action. You can do this by pressing a number button first and then an action button—or the other way around. Action buttons are arranged in two rows below the white number buttons. You must choose one mathematical operation (+, −, ×, or ÷) for one number, and discard or return to your deck the other two. There are also bonus action buttons (+1 and −1 are unlocked from the start; others can be bought). These don’t interact with drawn numbers and can be pressed anytime. Once you’ve formed all 3 pairs, hit Confirm to move to the next turn, where 3 new numbers will be drawn.