A big round of polish based on what you've been telling us.
New tutorial text. All six tutorials have been rewritten. Level 4 has a new map so the lesson actually lands.
Blueprints that work like parts. Select a few blocks, save them as a blueprint, and load them into any level - they appear next to Start, ready to drag into place. Load twice, get two copies. The tutorials now teach this.
Select more than one block. Drag a box around blocks or shift-click them. Move, delete or duplicate them as a group.
Small things. Restart now pauses at the start, the menu highlight follows your mouse, and "Back" says where it's going.
Thanks for playing - keep the feedback coming on Discord.