this is an early attempt at a fairly difficult game. i hope that more people get interested in running this game.
the first 4 levels are fairly straightforward, with the last 2 as far more difficult. the main strategy is to memorize when the difficult enemies spawn, as that is always fixed.
i lost a life in the finale of stage 5, which could be avoided. i had to rush to try to get at least the long range powerup in stage 6, as this makes the boss far safer and easier. i lose another 2 lives on the last boss of stage 6 due to misjudging the grenade launchers.
there is a lot of time to save on the run, as i definitely got more grenades than i needed and could just rush through several sections.
Just found out there is a 4th power up: The super bomb arrow!
when shooting the bomb arrow, it's kill all the enemies on the screen, same as the "?" item. it would reset after going to the next level.
You will get it if you manage to kill 4 enemies with one