WOW! Awesome progress! I really enjoy the new prologue over the previous one, it explains the game mechanics better. Also have you improved the wall jumping? It feels better than it was last time.
Once again, great visuals, the fact the character move slowly enhance the sense of weight. I suck at the game, the last boss killed me lol, but I still had a lot of fun and I can see it be even more fun once I master the controls and start jumping around, parrying attacks, using the bullet ability.
The only minus is that some sprites are blurry, one that came to mind was the snake miniboss. But that's just a question of polish.
And to finish, the linux build works flawlessly out of the box.
Keep it up!