Thanks for playing the game!
Indeed, currently the progression through levels is pretty simplistic. If you lose, the current level restarts. If you win a level, you advance to the next level. If you win the last level, you restart with the first level (the tutorial). Could it be that you already cycled through all levels? There's 4 in total, including the tutorial.
Adding chill background music and being able to change the coffee's rotation size are great ideas!