how to get GUI from startup Login with Lenny?

[klx300r]

I tried running a racing game I downloaded yeterday and the screen just went black and started flashing on and off occasionally for a minute. I rebooted the system and after an error free boot it asked for my login. My problem is that I login fine but only get a terminal prompt and no regular GUI screen...any idead how to get it back

[devils casper]

My problem is that I login fine but only get a terminal prompt and no regular GUI screen

Is it a GUI Login screen or just a prompt for login too?

What does it display on executing startx command in Terminal? Post error message here, if any.

[klx300r]

startx gives me this on the screen after some flickering: (my monitor cuts off the first 3 or 4 letters on the LHS):

:req: 80140909
feedback_div: 653
ref_div: 55
post_div: 4
re memmap
re common
re crtc1
re pll1
ed PLL1
re dac
KEYBOARD keymap compiler (xkbcomp) reports:
TYPE "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
Ignoring extra symbols
ffro xkbcomp are not fatal to the X server
ig/hal} couldnt initislize context: (null) ((null))

ng for X server to shut down finished PLL2
ned PLL1
ing Restore TV
re TV PLL
re TV Restarts
re Timing Tables
re TV standard
ng Restore TV
ontPath:FPE "/usr/share/fonts/X11/misc" refcount is 2, should be 1; fixing"

then the debian prompt , now is there anyway I can disable all my latest apps that were recently downloaded so that I can at least boot up the GUI and delete the ones causing trouble??