Update 38 adds some quality-of-life improvements based on some valuable playtester feedback:

• The three “optional” levels House Of Flying Arrows, Mind-Toggling, and A Switch In Time are now only unlocked after completing the main game. They were simply too frustrating or unfair for new players and too easy to unlock early on. All of the levels have interesting concepts that I will continue refining, but they have design flaws that mean they aren’t ready for the main game yet
• Guardian‘s timing has been made slightly easier, on account of it being a punishing level to die on, especially when players can see the solution but can’t execute it
• Placing objects in the Level Editor is much easier. For example, you can place belts, fields, and buttons without needing to clear away walls first. The general rule is that any objects that cannot share a tile with the object you’re placing will be automatically cleared away

Quality of life is going to be the theme for the next few releases. Fairer level designs and a more user-friendly Level Editor to come!