* player keys
* delete key?
* blocks+actions
- abcd.fgHi..LmnoPqrsTUvWx..
+ abcd.fg_i..lmnopqrs__v_x.z
* tetrinet:
* a: add (junk)line
* b: remove specials on field
* c: clear (bottom) line
* g: gravity (move all blocks down)
* n: nuke field
- * o: block bomb (blocks around any bombs on field are moved)
+ * o: block bomb (3x3 blocks around any bombs on field are cleared)
* q: quake (shift lines left or right)
* r: remove 10 blocks at random
* s: swap fields
* i: attack immunity (invincible to attacks)
* m: mutated pieces (gives several difficult pieces)
* v: clear column (erases vertical line)
+ * blocktrix:
+ * l: left gravity (pulls all blocks to the left)
+ * p: piece change (randomly changes player's currently falling piece)
+ * z: zebra field (clear every second column)
* ideas:
* x: seperate blocks (cut all shared pieces in quadra)
* quadra compatible?