You need a native English speaking proof-reader:

    You can open other islands
    by solveing a tasks in alredy
    opened.

I'm not ragging on your skills - my natural language skills are limited (to say the least) - but you need some assistance on that one. For example:

    You can open other islands
    by solving tasks on those
    already opened.

Previously discussed here: http://news.ycombinator.com/item?id=4756263