Tip: When determining a time limit, remember that players won't be as familiar with the level as you are. If you normally complete the level with around 100s left on the timer, others might run out of time on their first try.
This patch allows you to make explosion destroy specified blocks upon having touched them, as shown in this video. More information in the readme and .asm file.
Credit not needed. Moderator's note: It doesn't obey the Acts Like settings, but it's easy enough to expand the table if you need more explodable blocks.