feat: add pre-level introduction screen for EDA concepts

[Tusharjamdade]

Changes

• 🎁 Add a pre-level introduction screen to explain core Event Driven Architecture (EDA) concepts before gameplay
• 🎁 Introduce visual onboarding cards for Events, Filters, Sinks, Transformers, and Dead Letter Queue (DLQ)
• 🧹 Improve learning flow by guiding players before entering Level 1
• 🎁 Integrate introduction scene as the starting entry point of the game

/kind

Fixes #85

Release Note

Currently, players are taken directly into Level 1 without any explanation of the EDA objects used in the game.
This can be confusing for first-time users and learners who are unfamiliar with event-driven systems.

This change introduces a structured onboarding step that helps players understand:

• what each object represents,
• how events flow through the system,
• and how gameplay maps to real-world EDA concepts.

This improves both usability and educational clarity.

Added a pre-level introduction screen that explains core Event Driven Architecture concepts before gameplay begins.

Docs

[knative-prow]

@Tusharjamdade: The label(s) kind/<kind> cannot be applied, because the repository doesn't have them.

Details

In response to this:

Changes

• 🎁 Add a pre-level introduction screen to explain core Event Driven Architecture (EDA) concepts before gameplay
• 🎁 Introduce visual onboarding cards for Events, Filters, Sinks, Transformers, and Dead Letter Queue (DLQ)
• 🧹 Improve learning flow by guiding players before entering Level 1
• 🎁 Integrate introduction scene as the starting entry point of the game

/kind

Fixes #85

Release Note

Currently, players are taken directly into Level 1 without any explanation of the EDA objects used in the game.
This can be confusing for first-time users and learners who are unfamiliar with event-driven systems.

This change introduces a structured onboarding step that helps players understand:

• what each object represents,
• how events flow through the system,
• and how gameplay maps to real-world EDA concepts.

This improves both usability and educational clarity.

Added a pre-level introduction screen that explains core Event Driven Architecture concepts before gameplay begins.

Docs

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[knative-prow]

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Details

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[Tusharjamdade]

Hi @Cali0707, @ankitajana21, and @prajjwalyd,

I felt that redirecting users directly to Level 1 might create some confusion, especially for first-time players.
To address this, I’ve introduced a Level 0 (introduction level) that explains all the core game objects and provides brief context before the actual gameplay begins.

This introductory level helps users better understand:

• What each object represents,
• How they are used in the game,
• And how they relate to the overall event flow.

Please let me know if there are any changes you’d like to see, or if any of the information displayed should be updated, I’d be happy to make improvements based on your feedback.

Demo video:

2026-02-01.13-49-04.mp4

[prajjwalyd]

Hi @Tusharjamdade, thanks for contributing! I like where this is going... Some observations:

• use the same light background so that the game theme remains consistent, currently the level looks detached stylistically
• ConveyerController does not have reset_game_state method, why is it added there?

[Tusharjamdade]

Hi @prajjwalyd,
Thank you for the review. I’ve updated the background to match the other levels as suggested.

I had previously added a reset_game_state method to handle game resets, but since it doesn’t seem necessary at the moment, I’ve removed it to keep things simpler.

Please take a look!