[SP] Lp's Flingtro
That is correct sir, this will be in back-stock, I hope you play!
Don't worry, i will for sure! 
Not exactly a game breaker, since that's where the cube's going anyway, but it might be worth noting how high it's possible to toss for future deathfizzlers
well it does count as an unintended solution. There are a few other issues I'd like to fix too so you'll be seeing a new update hopefully soon!
4/5. As a practice level, this does nicely. But as a teaching level, not so much. If you haven't already thought of slideways portaling, this doesn't exactly guide you there.
I suggest starting the training with an entry room where you jump from a ledge into and out of portals in the floor, and slide sideways to get over a wall. Using the two elements in sequence might turn the lightbulb on that you can use the two elements together to build momentum. You might even push the player a little farther that way by having a second fling just like the first, only with portal surface on the ledge and a wall too high to get over on the first fling.
BTW, since you're using custom textures for your fizzlers, maybe you could create the polka dot texture for a fizzler that let's everything pass except Djinndrache 
. He never solves things the intended way anyhow!
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I suggest starting the training with an entry room where you jump from a ledge into and out of portals in the floor, and slide sideways to get over a wall. Using the two elements in sequence might turn the lightbulb on that you can use the two elements together to build momentum. You might even push the player a little farther that way by having a second fling just like the first, only with portal surface on the ledge and a wall too high to get over on the first fling.
BTW, since you're using custom textures for your fizzlers, maybe you could create the polka dot texture for a fizzler that let's everything pass except Djinndrache . He never solves things the intended way anyhow!
It should involve quite a lot of custom scripting... but I think it should be possible to block certain steam usernames from playing certain maps
On the teaching level thing: you might be right; though I haven't found anyone who has only completed p2 and hasn't used this technique, so I cannot test it 
Can you add this map to your Steam Workshop maps?