A small patch that fixes some of the "spike-and-platform" issues.
Full list of changes:
- Added a hint on level I-6
- Slight changes in spike placement and platform length (in order to make some places slightly more forgiving) on levels: I-4, I-5, II-9
- Slightly increased the delay of several lasers on level III-20
- Updated "dev time" on level I-20
- Slightly reduced polycount on every level of stages 1 and 2
- Significantly reduced polycount of the first stage background decorations
- Some decorations in stage 1 are now static. This should increase performance on low-end and integrated video cards.