I don't know if this is known about, but I just stumbled upon a glitch whereby I was teleported up the top of the wall to gain the 2nd secret of level 1, I did this by putting myself in the corner on the left and jumping sideways to the right while hugging the wall.
I assume this isn't the way you're supposed to get this secret so as an aside would anyone mind sharing how you actually do get it normally?

Thanks
Raziel236

Jumping while facing close to a wall is apparently a well known glitch. There is a medikit in one of the Greece levels that you have to use it to acquire (the kit is too high to reach without a glitch or cheat).

Here's a youtube link for acquiring the secrets in the first level:
https://www.youtube.com/watch?v=UqyOx54DWl8

Hah, thanks, well that jump (that she did in the video for the 2nd secret) doesn't work on my version. xD