bug fixes & optimizations — test_project Steam update #1173845

This update makes the following changes to levels: 3-1: Slightly reduced the rotation speed required to pass the level.3-2: Window count now correctly decreases when a window is closed.4-5: No longer generates unsolvable puzzles; added a pattern preview window.5-4: Fixed an issue where the progress window would go off-screen; it now resets correctly.5-8: Fixed an issue where some windows could not be closed with the mouse middle button.7-5: Slightly increased block size.*Level numbers are in "row-column" format, ordered from top to bottom and left to right, starting from 1.For example, "3-6" refers to the level at row 3, column 6 on the level selection screen, and is not related to the unlock order.