Thanks for the bug report, in main menu it was not working indeed, fixed now (will appear in next update).
in #31, tilting left-right changes chord between minor and major (like S3), front-back changes amount of voices (like S4).
in #32, #43 and #44 it only affects delay and low-pass filter(s).
in #23 and #24 it does not do anything indeed (yet).
This has not changed since the previous version. Sometimes it is hard to notice what the accelerometer does, unless you know what to expect - but at least the delay change should be obvious when turning device upside down. However if you adjusted orientation / axes swap settings, this might have changed things completely - maybe reset everything with 4321.
Hope this helps - if not, please let me know if you find a specific case when something still does not work - it might even be influenced by what was running previously, however complete reset (holding RST or power cycle) should set things straight.
It would be easy to add automatic complete restart after exiting every channel but that would slow things down a little, also I rather want to get to the "clean" behaviour of every channel where there are no memory leaks or unreleased resources...