Author here.

> replace command-tab instead of adding control-tab

Currently there is no UI to customize hotkeys. I have a ticket to frame work that can be done here: https://github.com/lwouis/alt-tab-macos/issues/8

However, you can switch keys in the code and get this working today. In `Application.swift` at line 16, replace

  let metaKey = 0x3B
  let metaModifierFlag: NSEvent.ModifierFlags = .control

with

  let metaKey = 55
  let metaModifierFlag: NSEvent.ModifierFlags = .command

I tested, and it overrides the default macOS app-switcher, so no need to use something like Karabineer Elements which is what I use to disable the default app-switcher in addition to add the new control-tab hotkey shortcut.

> I do prefer the command-tab, hold command, hit Q or M or H, continue holding command and hitting tab again

You can already hit control-tab then hold, and cycle with tab or shift-tab. What's missing is the option to hit Q/M/H.

I have a ticket to frame work that can be done here, inspired by the creative UI of another app called WindowSwitcher: https://github.com/lwouis/alt-tab-macos/issues/9