My best against the boss was 21s. Comment your time please. (ᴡʜᴇɴ ɪ ᴅᴏ ᴀ ᴛɪᴛʟᴇ, ɪ ɢᴇᴛ ᴛʜᴇ ғᴏɴᴛ ʀɪɢʜᴛ.) ◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉◉ ʏᴏᴜ ᴀʀᴇ ᴛʀᴀᴘᴘᴇᴅ ɪɴ ᴀ ʙᴜʀɴɪɴɢ ᴠᴏʟᴄᴀɴᴏ! ᴜsᴇ ᴛʜᴇ ᴀʀʀᴏᴡ ᴋᴇʏs ᴏʀ ᴅʀᴀɢ ᴛʜᴇ ᴄᴜʀsᴏʀ ɪɴ "ᴍᴏʙɪʟᴇ ᴍᴏᴅᴇ" ᴛᴏ ᴍᴏᴠᴇ. ᴄᴏʟʟᴇᴄᴛ ᴀʟʟ ᴏғ ᴛʜᴇ ᴄᴏɪɴs ɪɴ ᴇᴀᴄʜ ʟᴇᴠᴇʟ ᴛᴏ ᴏᴘᴇɴ ᴛʜᴇ ᴘᴏʀᴛᴀʟ ᴛᴏ ᴛʜᴇ ɴᴇxᴛ ʟᴇᴠᴇʟ! ʏᴏᴜ ᴄᴀɴ sᴛᴏᴍᴘ ᴏɴ ᴇɴᴇᴍɪᴇs, ʙᴜᴛ ᴀᴠᴏɪᴅ ᴊᴜᴍᴘɪɴɢ ʟᴀᴠᴀ ʙᴜʙʙʟᴇs! ᴛʜᴇ ʟᴀᴠᴀ ᴡɪʟʟ ʀɪsᴇ ᴀɴᴅ ғᴀʟʟ, sᴏᴍᴇᴛɪᴍᴇs ᴄᴏᴠᴇʀɪɴɢ ᴘᴀʀᴛs ᴏғ ᴛʜᴇ ʟᴇᴠᴇʟ!
Strategy: Straight away jump on the boss x5-6, then avoid shot #1, jump over shot #2, and that should through off shot #3, so you can jump onto the boss while it does its next move. When it jumps into the air diagonally, you have time a jump at the right time (just before it goes south-west) on top of it, then jump on it until the shots rain down, then go through the first gap you can and jump on the boss 'till it's dead. My times per level: 1:17s 2:19s 3:34s 4: 5: