Blockland's sounds are free royalty in the most part.
After school special is the same waySomeone showed me a weird video that had that as the background song that people rapped to or something if I rmemeber
The spear impact sound is from Quake.Blockland uses a lot of stock sounds and music.
blockland actually shares a lot of sounds with old games like doom and quakethe death sound is just the quake death sound sped up; you can her it more or less properly at .7 timescale or so if i remember right
http://www.youtube.com/watch?v=T6iVHgPBOs8
The vehicle impact sounds sound kinda like the sound the springs make in classic Sonic games, but at a different pitch.