I'm making a game (Tetpuz)

damn you are going fast! really eager to see whats going to come out.

coding is alot of fun. Never regret starting doing it. No hurries at all. you are doing it for fun after all

So ok then. Time for an update.

All game logic are in place now, including some new features I really wanted to add. There are still quite a lot to fine adjust and I need to reduce the code size a lot since I'm almost at a full 32kb ROM already and I do want to be able to add music and sound effects too.

But all in all... it's starting to look rather ok I think.
Not bad for being the first serious game I have ever made on a MSX.

Actual screenshot

And no - this is NOT a Tetris clone.

And yes - of course the picture used as the background is photographed by me too and is actually of my wife :)

I like the contrast between the title and the background image.
It's funny to see that with the same constraints we had in the 80's, we manage to make such modern home pages.

For the 32 KB, it's not going to be easy, but there are surely some KB to gain by:
- Factorizing your code (grouping similar processes),
- Compressing the data (if not already done),
- Excluding all the functions you don't use in the library (SDCC only removes unused functions file by file),
- Changing the optimization flag to optimize size rather than speed (Optim = "Size"; in your project configuration).

And in the worst case, if you don't succeed, with MSXgl it's easy to switch to a 48 KB cartridge with its own interrupt code so you don't have to deal with the slot switching.

First thing that comes to mind to reduce size is optimizing the number of patterns used in the title screen.
The image looks almost in perfect symmetry. You could keep half the tiles and compute the other half by mirroring the first half