This game is quite short, and I think it makes an okay TAS. There were a few sections that looked improvable, so I decided to try them out myself.
Here is the movie file. I TASed the first two levels (my test run is probably further improvable), and here are the results:
*The intro screens can be finished 16 frames faster.
Level 1-1 was done 13 frames faster. Comments:
*You don't have to kill the first boar on level 1 - it's faster to jump on him.
*For the ledge that Truncated asked about, it is indeed faster to slow down a little right before the jump in order to avoid bumping into the wall.
*The invincibility potion here is actually very hard to avoid picking up, so it's faster to pick up it than to avoid it.
Level 1-2 was done 89 frames faster. Comments:
*It's faster to break the second A block rather than slowing down by bumping into it.
*You can get a nice speed boost from the first moving platform here, since it is moving to the right.
*By jumping off the second platform as soon as possible, you can avoid getting slowed down by it, since it is moving to the left.
*You don't have to jump on the third platform at all.
With these things in mind, the other levels look improvable too. And like Truncated mentioned, you should definitely test if killing more enemies can remove some of the worst lag, even if it costs a few frames to kill enemies. I hope you make an improved run, but with the known improvements in mind, I vote no on this run.