It's a good only keyboard input game for chill gameplay. I didn't saw the boost in action but I saw an really important bug and that is when you are walking as for many games (even Minecraft for years) diagonally movement is a bit faster but in your game you can use WASD or Arrows and I observed it stacks so you get 2X speed and combined with diagonal movement you can have X3 speed. I don't see this bug as a problem ,more like an idea for a game where base thing is movement.I can't rate audio because I can't hear gDev projects in browser(IDK why).