You may have a stale copy of blockland, try redownloading.
OR
You may have a problem with the amount of memory you use. Blockland takes up a substantial amount of memory while running. The amount of memory used increases as you play blockland. So closing background tasks can help. To do so press ctrl alt delete and open task manager. Delete all apps running under your name aside from "explorer.exe" and "tskmanager.exe" And/ Or any other programs you dont want to close.
This may buy you some time but may not last. If so use badspots post to update your driver.