Really fun game! The art direction was really polished and I liked the limited color pallet. The platforming was great and really satisfying. I also found the dialogue very funny, and its clear you have a love for metroidvania games and MGS.
One of the issues I had though was that I really didn't understand how to defeat the final boss, and ended up watching the playthrough video from itch.io to understand what to do. I also ran into a bug where I took damage from the flame throwers and got boosted into a ceiling tile and couldn't move. I ended up restarting the game again.
But overall, really impressive you finished this for a jam while using Construct 3 for that matter. Great job!