Bizarre opening
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Looked like the Hippopotamus Openeing...
I probably would have played 8. ... g5 before I castled. Also, I try tofienchetto in the opposite corner if my opponent does and the opportunity presents itself.
Oh, I know who the other player was. I once played against him, too 
I like 4. ... e4. You need to exploit his weak white square complex early. If he wants to waste pawn moves driving your knight to a better square in the center, let him (instead of wasting time with a side pawn move to stop him). If he leaves the hole at d3, occupy it, even if a trade leaves you with an isolated pawn up there. As long as you can defend it, it will be a bone in his throat, hindering his development.
When you have a lead in development you should try to open the position. This is done by pawn exchanges.
8. ... Re8 threatens to play d4 next where a central file will open up.
9. ... f5 looks better than retreating the knight.
14. ... f5 planning to play f4 is an attempt to open lines.
When you're better developed you must create open lines for your developed pieces to use.
Based on the opening principles and the fact it's never played, i'm assuming it must be a bad opening. What should I have done early on to crack it?