Night mode.

[e5frog]

When changing to night mode (as in original) the palette can simply be changed to B/W and all pixels not in background will change to white. It needs a line added under Dino and cactae to prevent it from floating in the air. I suggest a single pixel line from one side to the other directly under Dino.
There's also room for better performance (more speed), not that it's currently an issue.

[AlexeyMatrosov]

Thanks!
Yes, I thought about this mode too. In addition to what you wrote, I also thought about sun and moon (which will slowly move across the sky). And I want to experiment which will look better:

• full BW mode + single white line
• BW mode for sky and light green grass
• BW mode for sky and gray grass

And I'll also see how good a non-abrupt change will look. I mean that the palette will not change for all lines at once, but after some small interval

[e5frog]

It would look quite nice to let the darkness fall or fade in from top and bottom a row at the time.

Looking forward to duck for the birds...

[e5frog]

Can you send messages to each other here? Not used to GitHub.
email: e5frog@gmail.com

Anyway, don't like the flashing squares when crashing. In the original Dino just freezes and gets staring eyes. Maybe a pixel for eye while running and close when die or no pixel when running (as it is now) and open an eye-pixel when crashing?
If you want it like it is, fine with me, but it comes like a chock every time I crash. ;-)

Crash box could be narrower at the right side of the cactus, I frequently crash while landing - not touching the cactus, it would be better if items could overlap before crashing - which is difficult, I know.

Also, there's no need to clear the entire screen at a restart, you can stop at the ground - or even jut draw a background block over the entire area that is used by graphics using the blit function. Something 102x25px or wider if you plot outside the visible MESS/MAME screen area (real machines may show more or less of the screen).

Wonderful job!
So... ducking and birds?