Inescapable Full-screen and Windowed Apps

[Ezra Sharp]

In some apps there seems to be no way to "Alt + Tab" back to the desktop once you are in it.

Examples are Nexuiz and Tree Worlds.

Alt+Tab would not work, the mouse could not get out of the game window, nothing worked.

The example with Nexuiz was I managed to get into a state where the Quit buttons just returned you form the menu to the game.

And tree worlds was full-screen, I accidentally selected the wrong language and got stuck somewhere, I spammed random keys until F2 brought up the terminal for the game and luckily the command "quit" worked.

Stuck in the game, unable to escape to the desktop.

Is there a way we could sandbox apps or something, prevent them from over-riding these System key-bindings.

ProblemType: Bug
DistroRelease: elementary OS 0.3
Package: elementary-desktop 1.350+394~ubuntu0.3.1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CrashDB: elementary_meta
CurrentDesktop: Pantheon
Date: Mon Oct 13 15:24:16 2014
InstallationDate: Installed on 2014-08-18 (56 days ago)
InstallationMedia: elementary OS 0.3 "Freya" - Daily amd64 (20140810)
ProcEnviron:
 LANGUAGE=en_NZ:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_NZ.UTF-8
 SHELL=/bin/bash
SourcePackage: elementary-meta
SuspiciousXErrors:

ThirdParty: True
UpgradeStatus: No upgrade log present (probably fresh install)