Definitely retro
This is definitely an old-school game, from the slow movement to the stubby little stab of the knight's sword and the predictable enemy patterns, even the fact that there's no checkpoints. Some might consider these to be negative aspects of the game but it really does pay tribute to the classic style of gaming on the NES. In fact it reminds me a lot of Wizards & Warriors. And since it seems like you were aiming for that kind of feeling, i can't knock it because it definitely brings back plenty of nostalgia and did entertain me.
I especially like the explanation that comes up when he hits spikes or water (the thorns are sharp. I cannot swim.)