I've done a bit of surfing before and know the general concept. That being said, the movement feels too far off the general source engine movement to carry over well. I'm not a fan of the jumping backwards mechanic at all. I guess you're trying to emulate the backwards bhop mechanic speedrunners use? I just don't think its fun not being able to see your gameplay. For the first level, it just seems like walking up a big platform that doesn't really encourage surfing and then requiring a backwards jump to beat (which I couldn't pull of). I'd be more keen to try a traditional, starting up high surf map.