this is a pretty interesting and unique idea! it's almost like a slightly more interactive Cookie Clicker.
The biggest problem is that it seems like you run out of things to do very quickly. There only seems to be three clocks to buy which aren't that different from each other, and once you've filled every tile there's no more game except watching your money go up. I'm guessing you were planning on having more clock types, judging by the reroll in the shop? Maybe you should also be able to sell or get rid of clocks to make room for new ones if so?
Also, I absolutely LOVE how one of them looks like a Game & Watch and I wish the others also looked like that!