CS2D closes itself
This can be caused by bugs, damaged Lua scripts or problems with your system.
Some possible problems with solution:

No internet connection -> Go online / start with -off commandline

Problems with network device -> Get the latest drivers

Firewalls / Antivirus -> Configurate or turn off

Outdated system -> Run update function (e.g. Windows Update)

Outdated drivers (graphics/sounds) -> Get the latest drivers

Outdated OpenAL -> Get latest OpenAL drivers at connect.creativelabs.com/openal/Downloads

Outdated DirectX version -> Get the latest version

General problems with graphics -> Try all modes with Launcher.exe

Other software -> Quit all applications you don't need

Virus -> Scan and clean your system with Antivirus software

Damaged Installation -> Re-download and re-install CS2D

Weak/slow system -> Try another PC or upgrade your hardware
In most cases some updates should fix the problem!
Nothing helps?
None of the above helps to solve the problem? Then your system is probably too slow and old for Counter-Strike 2D.