Cheat engine is your friend here.
Starting value =
life - 120
Stamina - 100
First map is already explained.
2nd map, go around getting idol statue, and put them back on the corresponding altar (check blue symbol on altar vs symbol on idol head). Once the last one is put, spider boss appear.
3 rd map, go around taking colored bush, use 2 (second choice in item menu) to fuse for a color phial. Use phial on the corresponding egg color to destroy them until you can reach the boss.
4 th (last map), take picture of each tree with a skull (harpies inc), then move to new path. repeat until you can reach the last area - instant end cg & text.
Finishing a map should unlock the animation of the map.
Finishing game unlock cg and "animation" of the background girls...
for full save, check attachment (if I didn't mess up the file)
All in all a deception.
Getting hit make you lost life, stamina an you can't ready your weapon quickly => lose lock :/ You need to use a lot the close combat weapon by hit and run tactic to survive.
Nice animation but no speed variation or climax, voicing is minimum during scene. And no sound effect for H animation. Plus no boss animation (at least no H / ecchi scene)
A bit more work and it could have been a decent work. But clearly not worth it's price.