Android Question

Hello there

i have just bought 2 x Acer Iconia A3-A30 tablets

firstly some of the apps i have downloaded for my kids (Nemo's reef) won't work on the new tabs? i thought these were running 5.0 and thought that would be sufficient

secondly is there any way to go back after you have started set up the tablets and get data of other devices registered to the same google acct

my son has 2 old tablets (each signed into my google act) with various games on each one, i would like to get the data an apps from these on to the new tablet

kind regards