NESTRIS

NESTRIS is a nes tetris clone that aims to be a perfect recreation in every competitive aspect, additionally it aims to lower the input delay to the lowest amount possible.

c++: I went for c++ since it's the language I know best and since it's known for its optimization.
delays: Playing on an original console with a crt yields 1/2 frame of lag from the crt, 2 frames lag built in the nes, plus controller lag. Playing on a normal emulator yields 4 frames of lag, plug monitor lag and controller lag. Retroarch's run ahead option reduces lag to 2 frames.
On my 144hz freesync monitor with a ps3 controller and Game Mode on I have 16-24ms of lag as shown in this video: https://youtu.be/AJSLQxP-hB4
fps: One of the reasons why I chose c++ over a web application is that I couldn't get a broswer game to have exactly 60.0988 fps at all times.

It's hard to find a ntsc nes and crt if you live in the EU and vice versa.
Crt's aren't healthy to watch, and they're very hard to move around.
The NES, its controllers, cartridges, aren't in production anymore, so sooner or later most of the pieces scattered around the world will break (the NES classic is a shitty emulator and doesn't count).
It's really easy to set up NESTRIS on any pc, no need to configure emulators or download illegal files (I guess this project may be illegal tho).

Accuracy of the program must be checked for 1 frame discrepancies.
Console manager should be changed to a proper (hidable) window.
A real use interface on a separate window is needed for the settings, right now settings can only be changed through the settings.ini.
Quality of life.
Pause (pausing invalidates a run).
Sound: I tried to understand how the nes sounds work, and while I got the basics I couldn't understand how to emulate sounds from a cartridge, so I'll probably end up playing some audio clips.
More game modes.
Modding options?
Fullscreen option: fullscreen could reduce input lag by 1 frame.
Implement this glitch that is in the original game: when you clear the top line it also clears the bottom line.
2 Player mode
Statistics option: long piece drought, tetris %, etc.
Volume options

the nes had a 4x16 color palette, but sometimes black is considered transparent ("The first 2 colors of every entry are black and white. However, the first color is actually ignored; regardless of its value, it is treated as a transparent color through which the solid black background is exposed."). My program doesn't have a consistent way to handle this.
Do all the shader.setVariables things.
A well done separate window with configurations, usable with a controller too.
~~Holding down the down button will give points even if you started holding down before the piece spawned (start a level 19 game and hold down for 10 seconds to see)~~ fixed
Add custom tiles for symbols like ":" "%"
Fast theme music should play once the playfield reaches a certain height