Tower of OZ could change?

Would be nice if they gave the option to skip floors that the player previously passed at the cost of a time penalty. I get so tired of having to wait a long time for monsters to spawn, or doing the same jump quest over and over and over and over again.
I'd also be happy if they gave the option to restart at the floor the player left off at in the event of a game crash or sudden disconnection, too. For some reason spamming dragon barrage tends to make me disconnect on certain floors