Hehehe funny and time-consuming.
It remind me also of old times (it was on TO8, not amstrad though <img src="smileys/smiley1.gif" border="0" align="middle" /> )
Even 20+ years later, the game mechanics still work.
I don't know if it is on purpose, but during the first level, the fact of starting back from the left of the screen gave one bomb (even if there was a bomb already dropping atm).
From the start of level 2 this principle disappears (making it harder).