I welcome this idea!
Although one problem I feel right off the back is that the timers spawn randomly, and honestly can easily mess you up due to simple chance. Since the map isn't symmetrical, you could have an unfair spawn where you can't reliably get to the timer unless you were experienced.
Maybe instead have the timers give lower output, but have them spawn more constantly? That way you can keep people moving but make it a little more fair? Or floating easily accessible collectibles spawn away from the player, I dunno.
Cheers!