Could someone please provide a full guide on how to get all 15 abilities? I already finished the game and even managed to get to the secret boss, but I could only get 10 out of 15 ability chips; the other 5 are nowhere to be found, and I already searched every pixel of every stage for them. I'm pretty sure that at least one of these secret abilities (If there are any) is the key to defeat the secret boss, because none of my attacks are able to deal enough damage to him. Thanks in advance for the help....

A few months ago, Valve has introduced new currencies. These include: -Argentinian Peso -Costa Rican Colón -Israeli New Shekel -Kazakhstani Tenge -Kuwaiti Dinar -Polish Zloty -Qatari Rial -Ukrainian Hryvnia -Uruguayan Peso -Vietnamese Dong Developers have to set the prices themselves manually and as long as they don't do that the games won't be avaliable in the regions that use these currencies. Could you please update the pricing? I would like to support your game by buying it, but currently I have n...

I don't see a fullscreen option. Is there a way to do this that I'm missing?

Is the playable character depending on the story/level, or can we choose at the beginning/each level? Can we choose between the boy and the girl or is it imposed to the player?

Could it be that the advantage-system works like the one in Pokemon? Water is effective against fire, plant attacks against water and so on? Just beat around 4 bosses, so I'm not sure how to deal with the "wind area" :( (you know... the cooling fan area)