Invader Game

A UserForm-based game that demonstrates form workflows and runtime image verification.

View the sample project on GitHub: example/space-invader

What it does

Invader Game is a small workbook application that can be inspected, executed, and reviewed as source.

Why it is a useful xlflow example

It demonstrates UserForm event handlers, timer cleanup, and interactive visual verification.

Project structure

The repository keeps VBA under src/, the workbook under build/, and project behavior in xlflow.toml.

xlflow features used

• doctor, status, and pull for setup and source synchronization;
• fmt, lint, and analyze before Excel operations;
• sessions, run --diagnostic, inspect, and export-image for verification.

Verification strategy

Run the source checks, push into a disposable workbook, execute the documented entry point, inspect the affected cells or form, export an image when layout matters, and review the Git diff.

Commands to reproduce

xlflow doctor --json
xlflow pull --json
xlflow lint --json
xlflow push --json
xlflow run --diagnostic --json
xlflow inspect workbook --json
xlflow export-image --json

Repository

See the linked example repository above for the workbook and source files.