Oh, I know what your issue probably is, I'm betting one of two things.
If you're talking about saving it to one of the save slots, then your screen is probably going red becuse you're trying to put upper case letters in your file name. Am I right about that? When you hold the shift button, the game still registers it, and as a result, they'll be killing themselves off multiple times, which can cause the game to have trouble keeping up
alternately, if you're just trying to select the text in the text box, you may be holding down shift instead of the ctrl button to do the "select all" and "copy" functions. I'll check it out.
Okay, first off, lets get your text fixed, no one is going to be abel to play it as you have it here. What you want to do is run it together as one long text string, and then put spaces NOT "end lines" (the enter button) in order to keep the text from going off the screen. I'll put up the playable version of your string here: (I also renamed your level to "Level 1" and gave your name in teh author's box. I'm also turning your par score down to 2.
15BG15B2AB13AG14AB2AB13AG14AB2AB13AG14AB2AB13AG14AB2AB9AB2AB G14AB2AB6AB2AM3A2G13AB2AB9AB3AG14AB2AB13AB14AB2AB12AB15AB2AB 11ABG5I10AB2AB9AB2AG15AB2AB12AG15AB2AB11ABG15AB2AB9A2BAG15AB 2AB7A2G3BG4A2G9AB2AB2M3A8G4A2G9AB2A30BAXDBD2ACJA2B2AB10ABEJF IA2EABF2A2B9ACDBEBACHA2B2ABC9ACEJFIADHABF2ABD9AC X13034053034029XLevel1@Oyvoyvoyv
All in all, a very decent level, but one tiny flaw: In order to get to any of the red keys, I had to jump through the water to land on the red door, and then jump back through the water onto the turf and then jump over to the key, but if you jump ontop of the door, there's no need to jump back to get the keys, you can just jump down and grab the acorn. this issue can be fixed VERY easily, simply by adding some terrain, spikes, or lava in the way to keep you from jumping down into the area where the acorn is.
I also checked out your second level. and fixed it for display purposes. Again, remember that you can insert spaces into your code and it usually won't break anything, but an "end line" will break your code almost all the time.
31B2ABD26AEB2AB28AB2AB28AB2AB28AB2ABA3G22AGAB2ABA3G10AG10A 2GAB2ABA3G20A2G2AB2ABA3G15AG4AG3AB2ABA2G20A2G3AB2ABAGAG18A 2G4AB2ABAG19A2G5AB2AB2A2G16A2G6AB2ABA3G15A2G7AB2ABA3K7AG6A 2G8AB2AB28AB2A2B3A19H4A2H2A2B3HB23HBAXDBCDAEJA2B2AB10AC2B2E ACIA2B2A2B9ABEJFCACGABF2ABC9ACEJDBAFCABFBFBD9AC2BEDAEGA2EBF BE3A3B3ACEJEFAFBABJBFBG9ACBD2EACIA3BGBH6A4BEJGJAEBABJACBI9A C2BGIADJA2B2ABJ9ABEJ2HAFBABJBFC10AC2BGBADEA2B2ABF3ABH2BEBC X11008058009015XLevel2@Oyvoyvoyv
It was far more complicated, but also ended up seeming like the entire level was a red herring. I just jumped my way up the far right hand door and jumped a little around the water to grab the acorn. I had orginally thought I was supposed to do somethign with the swinging boulder and thekey, but that just turned up nothing. If you were actually trying for that effect though, it worked brilliantly.