add: refactored everything

README.md

@@ -1,16 +1,24 @@
 # SNES Patcher
-Patch your SNES games with IPS or BPS patches, starring SNES Patcher!
+Create patched copies of Super Nintendo ROMs with IPS or BPS patches.
 
 ## Features
-- Written with GTK4, not GTK3
-- Written in Rust, not C/C++
-- Simple, intuitive user interface
+- Native GTK 4 interface designed for GNOME
+- Safe workflow that preserves the original ROM
+- IPS records, RLE records, and optional truncation support
+- BPS actions, metadata, and checksum validation
 
 ## What is this?
-SNES Patcher is a simple GTK4 application where you can patch your SNES ROMs with IPS or BPS patches.
+SNES Patcher is a small GTK 4 application for applying IPS and BPS patches to SNES ROMs. Choose a patch format, select a ROM and patch, then choose where to save the result. The original ROM remains untouched.
 
 ## Why?
 The idea to build this application came from the [Super Mario World widescreen patch](https://github.com/VitorVilela7/wide-snes) built by [Victor Vilela](https://github.com/VitorVilela7/). Being a big fan of Super Mario World, I was eager to try it out. I happened to find FLIPS, another IPS/BPS patching utility. Functionally, FLIPS worked but aesthetically, FLIPS looked horrible. I decided to scratch my own itch and built the same utility, but from scratch. Thus, SNES Patcher was born.
 
 ## Where can I download it?
-Currently, you can build from source by downloading `rustup`, thusly downloading `rustc` and `cargo`. Packages coming soon!
+Currently, you can build from source by downloading `rustup`, thusly downloading `rustc` and `cargo`. Packages coming soon!
+
+## Building
+Install the GTK 4 development files and GLib resource compiler, then run:
+
+```sh
+cargo run
+```