Ultimaze

[b]ultimaze[/b] is a simple-looking puzzler with [b]200 labyrinthine levels[/b] and a ton of different mechanics (portals, keys, switches, disappearing tiles, block-pushing, magnets, springs, ice, bombs, etc.). levels are unlocked one by one, but there's a [b]skip level button[/b], so you can keep progressing if you get stuck on one. skipped levels weren't marked initially, so after a while it was problematic to remember what you hadn't actually solved, but a patch eventually took care of it. [b]no move limit or timer[/b] on the levels, but there are [b]a few timing-based mechanics[/b] and a time limit can be set on custom levels in the editor, so I guess it's possible that some regular levels also have a timer (didn't try them all). [b]undo works from a fail state[/b], so if you happen to step on the wrong thing, no problem. [b]you can only carry one item[/b] for the most part (there's an item that extends the inventory), stepping on another replaces the current one and whatever you're holding can also be dropped. controls aren't rebindable. wasd/arrows to move (can be held), space/shift to drop or activate an item, 'z' is undo (can also be held), 'r' is level reset, esc toggles full screen. the menu is always visible and can be navigated with the mouse. there's a handy [b]block guide[/b] that explains what everything does, but level names usually provide a hint on what needs to be done. a [b]level editor[/b] is also available with its own guide. no workshop support, level codes have to be shared. it doesn't look or sound flashy, no music at all, but there's a volume slider for the effects, a player speed setting (always nice) and a brightness slider to make the background less blindingly white. windowed mode offers various sizes as well, but [b]there is no exit button[/b], have to switch to windowed mode and close the game like that, or press good old alt+f4. while it might not look like much, [b]plenty of content, great puzzle variety and a low price make it an easy recommendation[/b].