Amazing game could use a few tweaks for iOS

(Edits down below)

Amazing game, just a 2 points that could help

1) drains batteries like crazy 1%/minute
2) option for vstick or dpad would be nice for death peak
(3) Side side note the DS anime videos but I know this would make the game even larger

Aside from that this game holds up magnificently even 20 years later.
Though a digital booklet for the Manual might help for those whod never played it prior
Although this is all covered very well by the mayors mansion in the first town.

Playing on iPhone 6 with iOS 9.2

Update edit

Now playing on iOS 9.3
Have encountered a major issue limiting game play.
New game+ may have issues with techs in that they may reset when you arrive Spekkio once again, without any way of regaining them or relearning them.

listening2itunes about CHRONO TRIGGER (Upgrade Ver.), v1.0.6