After easily soaring past 3 million, I decided to try for 4 million in the same launch. Got to about 3.91 million then a spiked wall finished me. Still good fun though.
My best advice would be to hit obstructions to slow down, but don't go too slowly or you might not make some of the gaps. I got to 3542m this way, including one bomb leap.
I fail to see how you find this game easy since the numbers don't appear above the weights as you're creating them. This game is little more than guesswork.
Contrary to several opinions, I don't think this game needs a restart button. If you make a slip-up or something, you either still try to make the most of what's there, or you just go berserk and try to finish the game as quickly as possible. Who knows, you might still get a good score.
I think the game loads all of the monsters at the beginning of the level because the lag is always bad at the start of the level but towards the end it gets better. Let me say to the programmer that that is BAD PRACTICE!