Flipping/Reflecting Blocks (additional idea for Custom Blocks)

[orangetriangle]

Checklist (issue will be disregarded & closed if incomplete!)

• [X] I've checked both open and recently closed issues to ensure this feature is not already requested.
• [X] I am using the newest version of TETR.IO.
• [X] I am certain this is a feature request, not a bug.
• [X] I've thought this feature through properly.

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Is your feature request related to a problem? Please describe.

Custom Blocks (#561), recently added to the Long-term and Bounty milestone, may get unwieldy depending on what pieces are available.

Describe the solution you'd like

Buttons to reflect blocks over the Y-axis, possibly the X-axis, and mayyyybe the diagonals as well? Obviously disabled by default -- you'd need to enable them in the room or custom game settings.

Describe alternatives you've considered

A second hold queue, like in Tetris Blitz? A cylindrical board where the left side of the board wraps around to the right, Pacman style, so you wouldn't have to make straight edges on the sides? Flipping/reflection plus a cylindrical board?

Additional context

Flipping/reflecting is already a feature in several stacker games, such as Pokemon Tetris on the Pokemon Mini, Spyro Oshisaure's Puzzle Juggle Trouble, and as an item in Tetris Axis.

[deedeeen]

Nice additional improvement. There are two thing to care about - kicks in performing reflections/flips and number of allowed reflections/flips. Here's my comment over alternatives:

1. How will you implement the second hold; only assigning a different key or something?
2. Column 10 wraps to column 1 and columns 1-9 are now 2-10. Will it apply piece-wise, multiple-piece-wise or time-wise?
3. This would not get implemented if the main idea is rejected.