Angry Birds and other games force close (crash) on startup when using Simple2Ext (S2E)
I would try backing up the data for one of the apps, then clearing it and seeing if it works afterwards.

You could try just restoring /data/data/com.rovio.angrybirds/files/highscores.lua and see if that works.  I don't have Cut the Rope so I don't know how its files work, sorry!