Checklist

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

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

in tetr.io, you can change the board width and height in custom mode, but not zen mode. i want to try to do a four-wide board and see my spike/garbage counter but there isn't a spike counter in custom mode (ive seen a request on that though)

Describe the solution you'd like

i just want to be able to change the board size in zen, like on the settings in the right there is a setting that allows you to change the board width and height (and clear what already exists on the board)

Describe alternatives you've considered

add a spike counter to custom mode (but there's already an issue on that, and it's closed)

Additional context

even though the spike counter request on custom mode already exists, this feature request is different (except for the alternative)

also sorry if this doesn't make sense, i SUCK at making issues/feature requests on github