Javascript applications

So I have been learning Javascript for a while now and I'm getting it slowly. But still it feels so hard. I completed codeacademy.com Javascript course and had some other things to read. So far I have quickly developed three little things.

First one is rock, scissors, paper game. Simple game. Try the demoversion here: http://84.251.124.101/~shnigi/kivisaksipaperi/pewi.html

Next one is coinflipper. Select your side and flip it here: http://84.251.124.101/~shnigi/kolikonheitto/

Last one is Lotto-machine where you enter 4 different things and the machine tells you which one is best. Try it here: http://84.251.124.101/~shnigi/lottokone/

I'm planning to do a mobile app (Android) later from one of these.