RGB Vision

A tile-based platformer made for Jam for All BASIC Dialects #7.

Play it: https://ek-bass.itch.io/rgb-vision
Engine: BazzBasic
License: MIT

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Update 12.04.2026 (ddmmyyyy)

Updated version now uploaded.

1. No instant game over anymore. Instead of returning to game menu after death, player now just needs to restart current level.
2. Player can now see approx. 30% further.

No fullscreen support, sorry. Original GameJam version is written so that it would require rewriting and redrawing too much stuff.

Concept

You navigate dark levels with a small light radius around you. The catch: the world is split across three RGB vision modes, and no single mode shows everything.

Mode	Key	What you see
🟢 GREEN	Space	Walls, acid tiles, surprise tiles
🔴 RED	Space	Enemies
🔵 BLUE	Space	Coins, mandatory coins, exit

Cycle modes constantly to survive. Text characters (A–Z, 0–9) in levels are always visible.

Controls

Key	Action
← →	Move
↑	Jump
Space	Cycle RGB mode
ESC	Quit

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Tile Reference

Tile	Mode	Description
#	Green	Wall — solid, impassable
.	Green	Empty space
!	Green	Acid — instant death
?	Green	Surprise tile — triggers a random effect
@	Red	Enemy — patrols left/right
$	Blue	Normal coin — points
&	Blue	Mandatory coin — all must be collected to open exit
+	Blue	Exit — leads to next level
-	Blue	Player spawn point

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Surprise Tiles (?)

Surprise tiles look almost identical to normal walls in GREEN mode. Stepping on one triggers an effect defined per level — a jump scare image, teleport back to spawn, bonus coins, a forced pause, and more. Each tile triggers only once per visit.

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Scoring & Time

• Each coin collected: +10 points
• All 10 levels completed → final time is shown
• Optional coins reduce your final time by 0.2 seconds each
• Best time is saved to highscore.txt

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Project Structure

File	Description
rgb.bas	Entry point — screen init, includes, main loop
game.bas	Game engine: physics, rendering, levels 1–10
menu.bas	Main menu
intro.bas	Cassette-style loading screen
surprises.bas	Surprise tile effect subroutines
assets/	Images and audio

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Running the Game

Requires BazzBasic (included as BazzBasic.exe):

bazzbasic.exe rgb.bas

Or just double-click rgb.bas if BazzBasic is set as the default handler.

Windows x64 only. SDL2.dll and SDL2_mixer.dll are bundled.

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Adding Levels

Levels are defined as GOSUB labels in game.bas. Each level is a BazzBasic associative array. Copy an existing level block and edit the rows:

[level:11]
    Map$("level")       = 11
    Map$("title")       = "My Level"
    Map$("text-color")  = 10
    Map$("bg-sound")    = "assets/audio/mytrack.mp3"
    Map$("surprise-sub")= "[my-surprise]"
    Map$("cols")        = 31
    Map$("rows")        = 21
    Map$("row1")        = "###############################"
    ' ... 20 more rows ...
RETURN

Then update MAX_LEVELS# at the top of game.bas.

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Built With

• BazzBasic 1.0 — BASIC interpreter for .NET 10 with SDL2
• SDL2 + SDL2_mixer for graphics and audio
• Physics engine based on the BazzBasic platformer_example.bas demo

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License

MIT — see source files for details.
Kristian Virtanen, 2026