Not sure what causes the occasional score doublings (I see the "2x" indicator pop up sometimes, and I got 125 on my second run, but I don't actually know why). Does it just happen every 20 jumps or something?
Aside from that, this is a simple concept but reasonably well implemented. Platform disappearance is not very clearly indicated, though. The final flashing is an obvious signal, but the platform seems to disappear entirely before that flash, which is really misleading. Maybe have the flashing occur before the platform goes fully transparent?