About

I'm Efe Kerim Ayvaz, a game designer and developer in Istanbul. imperial64 is the name my games ship under.

I mostly design systems: progression, gameplay structure and player-facing rules that stay readable under real production constraints. I like a gameplay idea best when it is still messy and needs structure, and I test my designs by building them.

Right now that means Pet Salon Tycoon, a cozy pixel-art salon game for phones, and an idle RPG whose systems I specify in writing and build AI-assisted under my own design direction.

How I work

Define player-facing rules first, then test for clarity and pacing
Design progression for both short-term and longer-term motivation
Balance system depth with readability and production reality
Specify each system in writing, with acceptance criteria, before it is built
Bridge design intent with implementation details

Projects

Idle RPG In development · 2026
Current project: character, combat, progression and item economy designed as one system, specified and verified module by module, built AI-assisted.
Siege: Tower Rush PC demo · November 2020
My strongest systems and progression project: an anti-tower-defence game with in-run upgrades and a persistent talent tree.
Polygon Strife GMTK Game Jam 2023 · Browser
Role-reversal jam game: in-run progression, escalation and balance tuning, carried on to a released build after the jam.
Elementium: Secrets of the Arkain Graduation project · PC
Graduation project: sole programmer on a team-built turn-based roguelite, an implementation-heavy contribution.
Struggle of a Tree Global Game Jam 2023 · Solo, 48 hours
Solo 48-hour jam game centered on scope discipline and a replayability-minded core concept.
Project Samuro University team project · PC
Mechanic-driven platformer built around one clone-based traversal rule, designed and coded by me as sole programmer.

Tools and addons

Dynamic Ambiance Forever WoW: Forever addon · v0.3.1 · 2026
A World of Warcraft: Forever addon that eases your screen's brightness, contrast and gamma per zone and area.
forever-addon-dev Claude Code plugin · v0.1.0 · 2026
A Claude Code plugin for WoW: Forever addon development, built on the game's own API docs and 24 restrictions measured in the live game.

All projects

Elsewhere

GitHub: github.com/imperial64
itch.io: imperial-dev.itch.io
Support: Buy me a coffee
E-mail: hello@imperial64.dev