This must sound silly, but i really can't see how.
I got 23 cards and bought 2 PsyCores but how can i combine them?
The menu doesn't seem to have something clickable for that task, how do i do it then?
The menu says something about that it's redeemable with the clerk of the shop,
but talking to the guy just brings me to the product selection.
I'm sure it must be explained in the game, maybe i missed it.
Could you guys maybe help me out with this? Would be nice.

Cool, Thanks! :D
Now how was i supposed to figure that out? Meh, now i know. :)
Thanks a lot mate. :)

Oh my yes. It's not only that but it's also a very rewarding thing to do, and keeps me motivated.
I'm just at that point where i need to rescue that boy from the tower in my own mind,
but if it keeps being as good as it is right now, it will be one of the most entertaining games i've played so far.

I could slap myself for not getting this one earlier.
It is still dark and obscure which i usually don't like anymore, but in a hilarious way,
which is brilliant. :D

How do I get back to the main area?

I'm stuck in a section which I can't solve yet.

I don't know what the psis do or how to kill the blue cobwebs.When they explained the stuff in the game,it went over my head.

Anyone give an old dumb bastard a few tips to stop me jumping a bridge?
Enjoyed the game alot until I've hit a big wall I can't climb and going around in circles again like I do in every game lol.

From your post, there are not enough info or description of your problem. But if you stuck you can always check this walkthrough video:
http://www.youtube.com/user/Ephraim2040#g/c/E534E6A9A889979F

LOL.that vid helped me.

So obvious too.

Thank You Kindly.

P.S. there muyst be something wrong with the controls because what I see in the vid and what I'm doing is completely different.