Finished!
Whoa! I started and finished the game in 1 day (obviously I did reuse 70% of one of my older LD games' code, but I didn't had the time to write a whole new backend.)
I was actually very surprised I could finish making the game in a day, there was a lot of stuff to code... in the end I didn't had time for any graphics :(
But it is "finished"! and that's all it matters.
You can try it out at: https://ldjam.com/events/ludum-dare/39/power-idle-clicker