MY WISHLIST

- boot straight into AM
- nice graphical boot screen (all text hidden)
- installed drivers for XBOX 360 and ps3 controlers
- (maybe) within AM a shortcut to run full X desktop for tinkering in GUI
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If you want to save up more memory - you can use "nodm" as a display manager - it is really lightweight. And using it resolves problem with visible desktop when starting game - because there is no desktop, just black screen.
nodm = minimal display manager (on top of X) without chrome (windows decorations)
sudo apt-get install nodm