Here's the simplified technical information from the Tetris guidelines:

**Playfield & Display**
- 10×40 grid (rows above 20 are hidden, appearing as 10×20)
- Ghost piece enabled by default
- 1-6 next pieces shown (6 recommended)

**Tetrimino Colors**
- I: Cyan
- O: Yellow  
- T: Purple
- S: Green
- Z: Red
- J: Blue
- L: Orange

**Spawn Rules**
- I and O spawn in middle columns
- J, L, T, S, Z spawn in left-middle columns
- All spawn horizontally at row 21 (I) or 21/22 (others)
- Drop one space immediately if path is clear

**Controls (Standard)**
- Hard drop: Up arrow/Space
- Soft drop: Down arrow
- Move: Left/Right arrows
- Rotate clockwise: X
- Rotate counterclockwise: Z/Ctrl
- Hold: Shift/C

**Core Mechanics**
- Super Rotation System (SRS)
- 7-bag random generator
- Hold piece function (default enabled)
- Half-second lock delay
- 15 moves/rotations before lock (multiplayer/arcade)

**Scoring & Progression**
- Level up by clearing lines or T-spins
- Variable goal: 5× level number lines needed
- Line values: Single=1, Double=3, Triple=5, Tetris=8
- T-spin recognition (3-corner rule)
- Back-to-back bonus chains

**Game Modes**
- Marathon: 15 levels
- Sprint: 40 lines
- Ultra: 2-3 minutes timed

**Top Out Conditions**
- Block out: piece spawns overlapping existing blocks
- Lock out: piece locks completely above visible area