A beta update has been released, it includes:

[Gameplay]

• A new bonus perk, "Indoors" will make your jumps be contained inside the window of the game.
• Two old game modes have returned to the game, both "Flash" and "Fartlek" are available to use once again after being removed for being too unfair.

[Misc]

• Version is now displayed.
• Fixed the hitbox of the arrow icon.
• Adjusted the difficulty of the bonus perk "Crash".
• You can now skip the booting screen messages to go faster to the game.
• Background elements that aren't in use are destroyed to reduce memory usage.
• Back-end for the upcoming Momentum feature has been set, selected tracks have a multiplier now instead of changing the speed scale to a specific value, all stage scales are set to 1.0 for the moment.
  
  The Momentum feature is coming soon, read more about it: 
  https://lunzyde.itch.io/pixeltwips/devlog/103690/upcoming-changes-for-beta-momentum-feature