Congrats on making a game! I got to un-lockikng the O-row so I think that means I won? It would have been nice with some feedback there. Speaking of feedback, it was nice that the buttons were disabled when bought or not the next one to be bought, but it would also have been very good if they shifted in color or something when you reached the amount needed to buy the upgrade.
I think it would also have been nice if there was some visual effect on what unlocking these rows actually did to the spinning.
But great starter game!