For getting Xeyes to work automatically in IceWM Desktop, it need to modify $HOME/.icewm/winoptions file as

xeyes.tray: Exclusive
xeyes.ignoreWinList: 0
xeyes.ignoreTaskBar: 0
xeyes.allWorkspaces: 1
xeyes.dTitleBar: 0
xeyes.dBorder: 0
xeyes.dSysMenu: 0
xeyes.dResize: 0
xeyes.dClose: 0
xeyes.dMinimize: 0

And for the startup a line if 17 inch laptop with 1600×900 resolution

xeyes -geometry 64x64-74-100 &

PS. In antiX the startup file is on $HOME/.desktop-session/startup . Otherwise $HOME/.icewm/startup