Zorvyn is a vertical-screen handheld retro microcomputer app. Write and run streamlined BASIC on a custom character display, or unwind with original pixel mini-games.
### Features
• Retro character terminal: default amber phosphor glow, switchable to green. Block cursor blinks every ~500ms; text auto-scrolls up.
• Fixed 3-page on-screen virtual keyboard (Letters / Numbers & Symbols / Commands). No system keyboard required. Long-press backspace for continuous deletion; external keyboards supported.
• Lightweight BASIC with line-numbered programs & immediate mode. Includes PRINT, LET, INPUT, IF…THEN, GOTO, END, REM, plus RUN, LIST, NEW, CLS, SAVE, LOAD, BREAK and HELP.
• Local program storage: saves your work as JSON on-device. Automatically reloads your last program at launch.
• Runtime interrupt & clear error messages. Hit BREAK to stop execution; the interpreter handles infinite loops safely.
• Built-in sample BASIC tapes: HELLO.BAS, GUESS.BAS, LOOP.BAS, one-tap load.
• Lesson Trail: guided lessons for PRINT, variables, loops, conditionals and a number-guessing challenge, ready to run in terminal.
• Handheld game mode: two original pixel games — Byte Dodge (dodge falling blocks) and Star Catch (drag a paddle to catch stars).
• Adjustable settings: phosphor color, font scaling, deduplicated command history with clear option.
### What you won’t find
No in-app purchases, accounts, social sharing, cloud sync or online leaderboards. All programs and settings stay only on your device.
### Design
Retro vibe, fully original design — not a clone of any vintage machine. Optimized font and keyboard layout for vertical small mobile screens.
