v0.99998

An issue with PUF shots spawning over regen blocks has been fixed. Also...

• The algorithm for shot altars has been revised. Originally the entire shot list was trimmed to match the level (eg: the first 1.5 tiers on level 1) then shots were removed at random until there were as many as shot altars. This system was not built for 60+ shots. Now the trimmed shot list is loaded into tier buckets, and those are plucked at until we meet the target. This results in at least one shot per tier, with the odd double. Whilst it was fun to get a level full of tier 5 and 6 shots, it was equally depressing getting nothing but tier 1s. Hopefully this change doesn't normalise runs too much.
• Many dust effects have been added to improve mobs and bosses landing, as well as make divers and dashers more visible when they attack.
• A little polish for the level clock.
• Chunks of all kinds have been added, including bosses.
• Just the bug with PUF was fixed, but it was fairly serious.