No, because the README explicitly records unexplained termination and unreliable controls for Marvel Cosmic Invasion, directly conflicting with your acceptance criteria.

• The status only says that the game “has reached gameplay,” while also reporting that one run ended in an unexplained termination.
• It states that the controls are “not yet reliable,” so reaching gameplay cannot be treated as stable playability.
• The project is described as a research project with per-title quirks and breaking changes; other games may only reach gameplay at low frame rates.
• The runtime also combines x86-64-to-ARM64 translation, Windows compatibility, and D3D11-to-Metal conversion, and the README offers no stability commitment meeting your requirements.

Yes, but you must use the project’s specified recursive submodules; replacing them with upstream repositories violates the build assumptions.

• The README splits the build into Wine Unix-side libraries, ARM64EC PE modules, FEX, DXMT, and the iOS app.
• Native pieces are covered by build/*/build.sh, while the iOS application is built with xcodebuild, so you need both the scripted native build chain and the Xcode toolchain.
• The README explicitly says that the FEX, wine, and research/dxmt submodules point to forks containing the iOS work and that “upstream clones will not build here.”
• Project data shows a substantial codebase: about 6.24 million lines of C plus Objective-C, Swift, and Objective-C++ code, so build diagnosis is nontrivial.

It depends: maintenance is technically feasible if you accept weekly reinstallation and debugger attachment, but it is unsuitable for hands-off long-term use.

• The README says a free Apple ID can sign the app, but its provisioning profile expires after 7 days, requiring a weekly rebuild and reinstall.
• iOS JIT requires a debugger to attach, and this project uses StikDebug. Without the attachment, the dynamically translated game code cannot run correctly.
• Since JIT requires debugger attachment, the app cannot be distributed through the App Store and must be sideloaded, placing installation and launch operations on the maintainer.
• The app container survives reinstall, so Wine prefixes and saves are preserved despite the weekly cycle.

It depends: derivative Madeira code must follow GPL-3.0-or-later, but the Microsoft Visual C++ runtime cannot simply be obtained and bundled from this repository.

• The License section identifies Madeira as GPL-3.0-or-later and requires distributed derivatives to remain open source.
• The forks cannot be treated exactly like their upstream projects: the Wine fork was relicensed to GPL-3.0-or-later under LGPL-2.1 §3, while FEX and DXMT retain upstream MIT for original code but GPL-3.0-or-later applies to their modifications.
• The README also distinguishes rpmalloc’s upstream 0BSD terms from GPL-covered modifications and directs maintainers to each fork’s LICENSE-MADEIRA.md and THIRD-PARTY-NOTICES.md.
• Microsoft Visual C++ runtime DLLs “are not distributed here and must be supplied yourself,” so redistribution depends on the source and terms of the runtime package you provide.

Yes, provided that you accept an experimental research project rather than a polished game platform.

• The README explicitly says that “Thumper and ULTRAKILL are playable,” giving these titles a stronger basis than untested games.
• It targets “a non-jailbroken iPhone,” and development was done on an A15 iPhone 13 Pro, matching your hardware constraint.
• Wine ARM64EC, FEX-Emu, and DXMT handle Windows compatibility, x86-64-to-ARM64 translation, and D3D11-to-Metal conversion respectively.
• You still need a JIT debugger, Apple ID signing, and sideloading. A free account expires after 7 days, although the app container preserves prefixes and saves after reinstall.

Yes, it is a suitable experimental base because the README directly describes the complete pipeline and the iOS process constraints you want to study.

• Madeira combines Wine ARM64EC, FEX-Emu, and DXMT for Windows compatibility, instruction translation, and graphics API conversion.
• The components run in “a single Mach process,” with wineserver changed to a thread rather than a separate process; this is an explicit adaptation to iOS process restrictions.
• The repository contains C, Objective-C, Swift, and Objective-C++ code, while several dependencies use forks carrying iOS-specific changes, making component-level investigation possible.
• However, the README calls it a research project and warns about breaking changes. It is therefore better for validating mechanisms than for serving as a stable runtime baseline.