instead of rcl, lcl+hold a key. Prevent mines on initial click. Standardise a few scenarios for a challenge mode with levels, which will also allow people to compete for scores, or people aren't going to give this is second glance.
Judging by the scoreboard more than half your game is just too hard to reach for most people! Personally I can't quite make it to the 40s. I can't use the game in a flash tournament easily either because of the grind/level aspect.
takes a while getting started, could use an early introduction of an enemy type firing missiles on a short wavelength sinesoidal homing path or something with equivalent effect of preventing the most effect tactic being stopping+waiting>firing>dodge any remainder>repeat so you actually have to aim your deflections.
people having trouble max spread and rapid. then get a couple in health and regen, latter can wait a bit as health is maxed on lvlup. additional defence vs offence is your call but ignore quick learner.
not that hard guys, 2.25 mill 2nd go and still took 4 bombs to the grave. should be 4/5, 2/5 mostly for no api or score submission, also not having firing to default on (make bomb left click except on pause with autopause on lost focus for example), mixed upgrade balance (xp is a joke with level capped at just 20, health and specials upgrades may be well balanced but after the all important firing upgrades little room left to play with).
great mechanic, shame difficulty tended to increase via performance rather than puzzle-solving. Developing the core mechanic with 2-3 further 'types' than leapfrog, reflect and run and opening level design to the community should make v2.5 a solid 5/5 game.
no speedup, complete guesswork as to relative use of units, unreliable clicking of upgrade, occasional bug of not being able to place anything on a new level.
Also shame about the imprecise graphics on the moving red blocks, it's a challenging game already without adding artificial difficulty through unecessarily ambiguous hitboxes.
I'm at level 14 atm and I don't feel like the game's got significantly harder. A couple of extra blocks in the middle don't really change anything, maybe an extra colour or something..?