Simple yet fun! It's a great starting point and has a lot of potential. I think there's still plenty to explore with the concepts of buttons and countdowns. What if buttons could break? What if breaking a certain number of buttons unlocked new modes or power-ups? Could there be different ways to press them? Could you move the buttons around? Could they control lights, machines, or other facilities? The possibilities go on and on, and I think this kind of playful experimentation is what makes incremental games so fun to discover.
Overall, great job!