Oh, really?
This game (or games) were made in compiled Turbo Basic ok, with a little help of asm procedures (as well as other KE-Soft titles): https://a8.fandal.cz/search.php?search=tecno&butt_details_x=
Ahat about you asm-based "mario-wannabee"?
If you still want assembler, why not into xasm or MADS, use WUSDN IDE instead your online toy?
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Also there were threads like this before, and informations cost, so expect some Donate, or PayPal buttons here to press*
*or just use Search button of forums
doh... sorry, just had to...