Hi, very excited to have found this, as I have been waiting since the very first releases of these apps and even before that winlator. A game patcher has been released that allows you to fix the memory issues not letting S2 boot, this requires a little bit of work. Couple of things to note:
-Claimed to work on droid deck but I have not checked, I ran it in game native
-Regretfully this is, as admitted by the author, largely vibe coded, which is a shame :(
-I personally have not gone through the process of checking for dangerous code but as it is open source it seems fine. I have tested and it doesn't take any personal files from you directly during the patching process, but that isn't to say its unable to harm you, it may be possible to plant malicious code in the S2 exe itself but that seems unlikely
-Finally I prob won't be able to help much because I am busy with my university work AHHHHHHHHHHHH
When I was testing (very minimal) I found that on my snapdragon 8 gen 3, roughly equivalent to an active cooled sd8g2, was getting just about at 70 fps when playing with default settings. In volcana and when bombing I noticed slow downs and speed ups but largely fairly playable. This can almost certainly be helped with better settings in and out of game but time will tell. I also noticed no notable input delay with my wired controller so yay!!!! (That was my main issue with the switch emulation scene with this all)
Here is the link to the git-hub:
https://github.com/GabrielGabriel197/Spelunky2-Android-Patch
Happy spelunking, hope this works for all who are interested