You should make your game compatible with other calculators. It's not difficult just use 96x64 of the screen size and the "extra" space use for some info like lives, score etc. You should add also a pause when all info from the extra space will be displayed in 96x64 part of the screen. It won't be difficult for you and your game will have more players

.
Screen sizes of calculators supporting MLC:
Casio AFX: 128x64
TI 86: 128x64 (but MLC86 interpreter allows to use only 96x64 of the screen)
TI 83(+): 96x64
HP49G+: 131x80
TI 89: 160x100 (there will be needed a stretching mode

)
TI 92+: 240x128
BTW. MLC programming hints:
Crimson will write a MLC programming tutorial. Because MLC programming is a bit different then BASIC programming.
There is syntax list in the readme.txt and in MLCafx.txt are a few hints about MLC on-calc programming. There is also MLC on-calc Sprites Editor

if you want to use sprites (they are recommended to use because they are faster then using normal graphics commands).
You have to get used to a few things in MLC programming:
e.x. You make a loop as a function:
#FNCT LOOP
...
code
...
%I=%I+.1 (it increases %I)
#IIFF %I<.10 (if the condition isn't true it skips the next line)
#FGOB (goes to the beginning of the function)
#FEND
Example of using LOOP in an other function:
#FNCT MAIN
....
code
....
%I=.0 (sets the initial value of %I)
#FRUN LOOP (runs function LOOP)
#FEND
In fact there are various ways to do loops. You just have to use FGOB command and IIFF as you want.