Loved your game! The graphics and the high contrast are very cool. Nice scenery too. I also liked the gun and combining rope swing with dash was a great idea!
The gun would need some improvement, the bullets does not always goes on the intented direction.
The dash swing is too uncontrollable, maybe you can make it easier to control.
Is hard to climb platofrms using the swing because sometimes it hit a wall and you need to have the perfect distance to be able to climb. Maybe instead of hitting the wall you cold reduce the length of the swing hope to make the character keep going instead of stopping.
But i was not able to finish the game because after a dash swing my character became invisible. Also when i reached the gray door and moved right the character got stuck outside the map, so i had to replay it all.
I would also recommend to improve the character design. I like the size and movement animations, but his head is a little strange.