He's 20 years old and playing in the MJAHL. He's actually younger than everyone above him in scoring, as most in the league appear to be undrafted 2006/2007 Draft players (he's a late 1987 born).
Now I don't know what the level of that league is but I'm assuming it's below the CHL (WHL,OHL,QMJHL) and probably also a step below the 2nd-Tier (BCHL,AJHL, etc). If that is the case, Itan has a long way to go even if he does have a very high skill level.
There are other issues though:
-Will stickhandling with a puck on the ice hurt his ability?
-Will skating on the ice hurt his ability?
And if the move to the ice does set him back, how quickly can he adjust?
-How much hitting is there in inline hockey? if there's less, how quickly will he adjust when players get bigger, stronger, and faster the higher he progresses in ice hockey.
-How will he adjust to the defensive assignments and systems of ice hockey?
Either way, he would really need to dedicate himself to learning the game played on ice.